diff --git a/org.eclipse.xtend.core.tests/META-INF/MANIFEST.MF b/org.eclipse.xtend.core.tests/META-INF/MANIFEST.MF
index f6111cf4013..b4c744e9efa 100644
--- a/org.eclipse.xtend.core.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.core.tests/META-INF/MANIFEST.MF
@@ -24,8 +24,8 @@ Require-Bundle: org.eclipse.xtend.core;bundle-version="2.38.0",
  org.eclipse.xtext.builder.standalone;bundle-version="2.38.0",
  org.eclipse.xtext.java;bundle-version="2.38.0"
 Import-Package: jakarta.inject;version="2.0.1",
- org.apache.log4j;version="1.2.24",
- org.apache.log4j.spi;version="1.2.24",
+ org.apache.log4j;version="1.2.26",
+ org.apache.log4j.spi;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.internal;version="4.13.2",
  org.junit.internal.builders;version="4.13.2",
diff --git a/org.eclipse.xtend.core/META-INF/MANIFEST.MF b/org.eclipse.xtend.core/META-INF/MANIFEST.MF
index 2ac44476c47..e679eef8111 100644
--- a/org.eclipse.xtend.core/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.core/META-INF/MANIFEST.MF
@@ -64,6 +64,6 @@ Require-Bundle: org.eclipse.core.runtime;bundle-version="3.31.0",
  org.objectweb.asm;bundle-version="[9.7.1,9.8.0)";resolution:=optional,
  org.eclipse.xtext.xbase.testing;bundle-version="2.38.0";resolution:=optional
 Bundle-ActivationPolicy: lazy
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtend.core
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtend.examples/projects/xtend-annotation-examples/META-INF/MANIFEST.MF b/org.eclipse.xtend.examples/projects/xtend-annotation-examples/META-INF/MANIFEST.MF
index 853093bb75c..4e7169fab1d 100644
--- a/org.eclipse.xtend.examples/projects/xtend-annotation-examples/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.examples/projects/xtend-annotation-examples/META-INF/MANIFEST.MF
@@ -21,5 +21,5 @@ Export-Package: extract,
  observables
 Bundle-Vendor: Eclipse Xtext
 Automatic-Module-Name: xtend-annotation-examples
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 
diff --git a/org.eclipse.xtend.ide.common/META-INF/MANIFEST.MF b/org.eclipse.xtend.ide.common/META-INF/MANIFEST.MF
index 4088862b04b..a454016bfa8 100644
--- a/org.eclipse.xtend.ide.common/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.ide.common/META-INF/MANIFEST.MF
@@ -19,6 +19,6 @@ Export-Package: org.eclipse.xtend.ide.common.contentassist.antlr;version="2.38.0
  org.eclipse.xtend.ide.common.highlighting;version="2.38.0";x-friends:="org.eclipse.xtend.ide,
    org.eclipse.xtend.ide.tests",
  org.eclipse.xtend.ide.common.outline;version="2.38.0";x-friends:="org.eclipse.xtend.ide"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtend.ide.common
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtend.ide.swtbot.tests/META-INF/MANIFEST.MF b/org.eclipse.xtend.ide.swtbot.tests/META-INF/MANIFEST.MF
index 82f98032520..3f1b256fa69 100644
--- a/org.eclipse.xtend.ide.swtbot.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.ide.swtbot.tests/META-INF/MANIFEST.MF
@@ -5,7 +5,7 @@ Bundle-SymbolicName: org.eclipse.xtend.ide.swtbot.tests
 Bundle-Version: 2.38.0.qualifier
 Bundle-Vendor: Eclipse Xtext
 Bundle-RequiredExecutionEnvironment: JavaSE-17
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.rules;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtend.ide.tests/META-INF/MANIFEST.MF b/org.eclipse.xtend.ide.tests/META-INF/MANIFEST.MF
index 88f6250a3e1..da9c49a0921 100644
--- a/org.eclipse.xtend.ide.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.ide.tests/META-INF/MANIFEST.MF
@@ -36,8 +36,8 @@ Require-Bundle: org.eclipse.xtend.core;bundle-version="2.38.0",
  org.eclipse.xtext.ui.testing;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.testing;bundle-version="2.38.0",
  org.objectweb.asm
-Import-Package: org.apache.log4j;version="1.2.24",
- org.apache.log4j.spi;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
+ org.apache.log4j.spi;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.rules;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtend.ide/META-INF/MANIFEST.MF b/org.eclipse.xtend.ide/META-INF/MANIFEST.MF
index b920060fde3..476121e6902 100644
--- a/org.eclipse.xtend.ide/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.ide/META-INF/MANIFEST.MF
@@ -30,7 +30,7 @@ Require-Bundle: org.eclipse.xtend.core;bundle-version="2.38.0",
  org.eclipse.jdt.core.manipulation;bundle-version="1.21.0";resolution:=optional,
  org.eclipse.e4.core.services;bundle-version="2.4.300",
  org.eclipse.e4.ui.css.swt.theme;bundle-version="0.14.300"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.osgi.service.event;version="[1.4.0,2.0.0)"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-Activator: org.eclipse.xtend.ide.XtendActivator
diff --git a/org.eclipse.xtend.standalone/META-INF/MANIFEST.MF b/org.eclipse.xtend.standalone/META-INF/MANIFEST.MF
index 7e678baa756..d22e9b139cf 100644
--- a/org.eclipse.xtend.standalone/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtend.standalone/META-INF/MANIFEST.MF
@@ -10,4 +10,4 @@ Require-Bundle: org.eclipse.xtend.core;bundle-version="2.38.0";visibility:=reexp
  com.google.inject;bundle-version="7.0.0";visibility:=reexport,
  org.eclipse.jdt.core;bundle-version="3.37.0";visibility:=reexport,
  org.eclipse.emf.codegen;bundle-version="2.23.0";visibility:=reexport
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
diff --git a/org.eclipse.xtext.builder.standalone/META-INF/MANIFEST.MF b/org.eclipse.xtext.builder.standalone/META-INF/MANIFEST.MF
index ade51b74404..a4943b90f58 100644
--- a/org.eclipse.xtext.builder.standalone/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.builder.standalone/META-INF/MANIFEST.MF
@@ -7,7 +7,7 @@ Bundle-ClassPath: .
 Bundle-Vendor: Eclipse Xtext
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Require-Bundle: org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
  org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.common.types;bundle-version="2.38.0",
diff --git a/org.eclipse.xtext.builder.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.builder.tests/META-INF/MANIFEST.MF
index 508a274267e..32baccc367c 100644
--- a/org.eclipse.xtext.builder.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.builder.tests/META-INF/MANIFEST.MF
@@ -33,7 +33,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
  org.eclipse.compare;bundle-version="3.10.0",
  org.eclipse.xtext.common.types.eclipse.tests;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.eclipse.xtext.tests;version="2.38.0",
  org.hamcrest.core;version="1.1.0",
  org.junit;version="4.13.2",
diff --git a/org.eclipse.xtext.builder/META-INF/MANIFEST.MF b/org.eclipse.xtext.builder/META-INF/MANIFEST.MF
index 09e2a37716b..c8d4ffa814e 100644
--- a/org.eclipse.xtext.builder/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.builder/META-INF/MANIFEST.MF
@@ -65,6 +65,6 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.ui.console;bundle-version="3.14.0",
  org.eclipse.xtext.smap;bundle-version="2.38.0"
 Bundle-ActivationPolicy: lazy
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Bundle-Activator: org.eclipse.xtext.builder.internal.Activator
 Automatic-Module-Name: org.eclipse.xtext.builder
diff --git a/org.eclipse.xtext.buildship/META-INF/MANIFEST.MF b/org.eclipse.xtext.buildship/META-INF/MANIFEST.MF
index 85ef9eaf9d2..1f5054e1661 100644
--- a/org.eclipse.xtext.buildship/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.buildship/META-INF/MANIFEST.MF
@@ -12,4 +12,4 @@ Require-Bundle: org.eclipse.xtext.ui;bundle-version="2.38.0",
  org.eclipse.xtext.builder;bundle-version="2.38.0",
  org.eclipse.buildship.core;bundle-version="3.1.9";resolution:=optional,
  org.eclipse.xtext.ui.shared;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
diff --git a/org.eclipse.xtext.common.types.shared.jdt38/META-INF/MANIFEST.MF b/org.eclipse.xtext.common.types.shared.jdt38/META-INF/MANIFEST.MF
index 78a8b128d95..5d4e4c892e2 100644
--- a/org.eclipse.xtext.common.types.shared.jdt38/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.common.types.shared.jdt38/META-INF/MANIFEST.MF
@@ -10,7 +10,7 @@ Require-Bundle: org.eclipse.xtext.xbase.ui;bundle-version="2.38.0",
  org.eclipse.ui.ide;bundle-version="3.22.100";resolution:=optional,
  org.eclipse.jdt.ui;bundle-version="3.32.0";resolution:=optional
 Bundle-Vendor: %providerName
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.eclipse.ui.ide
 Export-Package: org.eclipse.xtext.common.types.shared.jdt38;version="2.38.0";x-internal:=true
 Automatic-Module-Name: org.eclipse.xtext.common.types.shared.jdt38
diff --git a/org.eclipse.xtext.common.types.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.common.types.ui/META-INF/MANIFEST.MF
index 44cb1ea55f1..dcd6135e409 100644
--- a/org.eclipse.xtext.common.types.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.common.types.ui/META-INF/MANIFEST.MF
@@ -19,7 +19,7 @@ Require-Bundle: org.eclipse.xtext.common.types;bundle-version="2.38.0";visibilit
  org.eclipse.xtext.smap;bundle-version="2.38.0";resolution:=optional;x-installation:=greedy,
  org.eclipse.xtext.common.types.edit;bundle-version="2.38.0";resolution:=optional;visibility:=reexport;x-installation:=greedy,
  org.eclipse.ui.ide;bundle-version="3.22.100";resolution:=optional
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.common.types.access.jdt;version="2.38.0",
  org.eclipse.xtext.common.types.ui;version="2.38.0",
diff --git a/org.eclipse.xtext.common.types/META-INF/MANIFEST.MF b/org.eclipse.xtext.common.types/META-INF/MANIFEST.MF
index f845d6b0b1f..d881bf537be 100644
--- a/org.eclipse.xtext.common.types/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.common.types/META-INF/MANIFEST.MF
@@ -12,7 +12,7 @@ Require-Bundle: org.eclipse.emf.ecore;bundle-version="2.36.0",
  org.eclipse.xtend.lib;bundle-version="2.38.0"
 Import-Package: io.github.classgraph;version="[4.8.176,4.9.0)",
  org.apache.commons.logging;version="1.0.4";resolution:=optional,
- org.apache.log4j;version="1.2.24"
+ org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.common.types;version="2.38.0",
  org.eclipse.xtext.common.types.access;version="2.38.0";
diff --git a/org.eclipse.xtext.eclipse.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.eclipse.tests/META-INF/MANIFEST.MF
index 76fdf7e1103..dcc58756e09 100644
--- a/org.eclipse.xtext.eclipse.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.eclipse.tests/META-INF/MANIFEST.MF
@@ -21,7 +21,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.xtext.wizard;bundle-version="2.38.0"
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: .
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.rules;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtext.ecore/META-INF/MANIFEST.MF b/org.eclipse.xtext.ecore/META-INF/MANIFEST.MF
index d15d7c52245..4df22d2c7cb 100644
--- a/org.eclipse.xtext.ecore/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ecore/META-INF/MANIFEST.MF
@@ -16,6 +16,6 @@ Export-Package: org.eclipse.xtext.ecore;version="2.38.0";
    org.eclipse.xtext.naming,
    org.eclipse.xtext.util,
    org.eclipse.xtext"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.ecore
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
index c7e3588ea43..0c999c57bb2 100644
--- a/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF
@@ -21,5 +21,5 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";visibility:=reexport,
  org.eclipse.emf.mwe2.lib;bundle-version="2.21.0",
  org.aopalliance;bundle-version="1.0.0",
  com.google.gson;bundle-version="2.10.1"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.ide.tests
diff --git a/org.eclipse.xtext.ide/META-INF/MANIFEST.MF b/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
index baa1093a189..1bd86306c85 100644
--- a/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ide/META-INF/MANIFEST.MF
@@ -14,7 +14,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";visibility:=reexport,
  org.eclipse.lsp4j;bundle-version="[0.23.1,0.24.0)";resolution:=optional,
  org.eclipse.lsp4j.jsonrpc;bundle-version="[0.23.1,0.24.0)";resolution:=optional,
  org.eclipse.emf.ecore.change;bundle-version="2.16.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext.ide;version="2.38.0";
   x-friends:="org.eclipse.xtend.ide,
    org.eclipse.xtext.ui,
diff --git a/org.eclipse.xtext.java/META-INF/MANIFEST.MF b/org.eclipse.xtext.java/META-INF/MANIFEST.MF
index afaf4f4cc20..05e121a26f4 100644
--- a/org.eclipse.xtext.java/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.java/META-INF/MANIFEST.MF
@@ -14,6 +14,6 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.jdt.facade;bundle-version="2.38.0"
 Export-Package: org.eclipse.xtext.java;version="2.38.0",
  org.eclipse.xtext.java.resource;version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.java
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.jdt.facade/META-INF/MANIFEST.MF b/org.eclipse.xtext.jdt.facade/META-INF/MANIFEST.MF
index c5d50d5155b..3d6e7106fec 100644
--- a/org.eclipse.xtext.jdt.facade/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.jdt.facade/META-INF/MANIFEST.MF
@@ -7,6 +7,6 @@ Bundle-Vendor: Eclipse Xtext
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Require-Bundle: org.eclipse.jdt.core;bundle-version="3.37.0"
 Export-Package: org.eclipse.xtext.jdt.facade;version="2.38.0";x-friends:="org.eclipse.xtext.java"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.jdt.facade
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.junit5.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.junit5.tests/META-INF/MANIFEST.MF
index eec4d28b590..eed3941f996 100644
--- a/org.eclipse.xtext.junit5.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.junit5.tests/META-INF/MANIFEST.MF
@@ -26,7 +26,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: .
 Import-Package: org.apache.commons.logging;version="1.2.0",
- org.apache.log4j;version="1.2.24",
+ org.apache.log4j;version="1.2.26",
  org.junit.jupiter.api;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.extension;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.function;version="[5.1.0,6.0.0)",
diff --git a/org.eclipse.xtext.purexbase.eclipse.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.purexbase.eclipse.tests/META-INF/MANIFEST.MF
index e4dd43dcfce..c4cf8147439 100644
--- a/org.eclipse.xtext.purexbase.eclipse.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.purexbase.eclipse.tests/META-INF/MANIFEST.MF
@@ -19,7 +19,7 @@ Require-Bundle: org.eclipse.xtext.purexbase;bundle-version="2.38.0",
  org.eclipse.xtext.ui.testing;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.ui.testing;bundle-version="2.38.0"
 Import-Package: org.apache.commons.logging,
- org.apache.log4j;version="1.2.24",
+ org.apache.log4j;version="1.2.26",
  org.hamcrest.core;version="1.1.0",
  org.junit;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtext.purexbase.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.purexbase.tests/META-INF/MANIFEST.MF
index 4aad01a6a9b..2a8fd7c1ba4 100644
--- a/org.eclipse.xtext.purexbase.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.purexbase.tests/META-INF/MANIFEST.MF
@@ -15,7 +15,7 @@ Require-Bundle: org.eclipse.xtext.purexbase;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.testing;bundle-version="2.38.0",
  org.junit;bundle-version="4.13.2"
 Import-Package: org.apache.commons.logging,
- org.apache.log4j;version="1.2.24"
+ org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.purexbase.tests;version="2.38.0";x-internal=true,
  org.eclipse.xtext.purexbase.tests.data;version="2.38.0"
diff --git a/org.eclipse.xtext.purexbase.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.purexbase.ui/META-INF/MANIFEST.MF
index e39a4ac2d69..8a265e7672f 100644
--- a/org.eclipse.xtext.purexbase.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.purexbase.ui/META-INF/MANIFEST.MF
@@ -22,7 +22,7 @@ Require-Bundle: org.eclipse.xtext.purexbase;bundle-version="2.38.0";visibility:=
  org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
  org.eclipse.jdt.debug.ui;bundle-version="3.13.300",
  org.eclipse.xtend.lib;bundle-version="2.38.0";resolution:=optional
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.apache.commons.logging
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.purexbase.ui;version="2.38.0",
diff --git a/org.eclipse.xtext.purexbase/META-INF/MANIFEST.MF b/org.eclipse.xtext.purexbase/META-INF/MANIFEST.MF
index 0b8034b27e6..8dd61e6795e 100644
--- a/org.eclipse.xtext.purexbase/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.purexbase/META-INF/MANIFEST.MF
@@ -16,7 +16,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.common.types;bundle-version="2.38.0",
  org.objectweb.asm;bundle-version="[9.7.1,9.8.0)";resolution:=optional
 Import-Package: org.apache.commons.logging,
- org.apache.log4j;version="1.2.24"
+ org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.purexbase;version="2.38.0",
  org.eclipse.xtext.purexbase.jvmmodel;version="2.38.0",
diff --git a/org.eclipse.xtext.relengutil/META-INF/MANIFEST.MF b/org.eclipse.xtext.relengutil/META-INF/MANIFEST.MF
index 875eefb49e6..c377fcd3de5 100644
--- a/org.eclipse.xtext.relengutil/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.relengutil/META-INF/MANIFEST.MF
@@ -9,3 +9,4 @@ Require-Bundle: org.eclipse.xtext.util;bundle-version="2.38.0",
  org.eclipse.m2e.maven.runtime;bundle-version="3.9.600"
 Automatic-Module-Name: org.eclipse.xtext.relengutil
 Eclipse-SourceReferences: eclipseSourceReferences
+Import-Package: org.apache.log4j;version="1.2.26"
diff --git a/org.eclipse.xtext.smap/META-INF/MANIFEST.MF b/org.eclipse.xtext.smap/META-INF/MANIFEST.MF
index 2bee80dfedc..105cea79562 100644
--- a/org.eclipse.xtext.smap/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.smap/META-INF/MANIFEST.MF
@@ -7,6 +7,6 @@ Bundle-Vendor: Eclipse Xtext
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.smap;version="2.38.0";x-friends:="org.eclipse.xtext.builder"
 Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.smap
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.testing.junit5.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.testing.junit5.tests/META-INF/MANIFEST.MF
index df0acff6ad3..b6e546145b5 100644
--- a/org.eclipse.xtext.testing.junit5.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.testing.junit5.tests/META-INF/MANIFEST.MF
@@ -13,8 +13,8 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";visibility:=reexport,
  org.eclipse.xtend.lib;bundle-version="2.38.0",
  org.eclipse.xtext.testing;bundle-version="2.38.0"
 Import-Package: jakarta.inject;version="2.0.1",
- org.apache.log4j;version="1.2.24",
- org.apache.log4j.spi;version="1.2.24",
+ org.apache.log4j;version="1.2.26",
+ org.apache.log4j.spi;version="1.2.26",
  org.junit.jupiter.api;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.extension;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.function;version="[5.1.0,6.0.0)",
diff --git a/org.eclipse.xtext.testing.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.testing.tests/META-INF/MANIFEST.MF
index e7a1b2fd46c..2f1b8dc8cea 100644
--- a/org.eclipse.xtext.testing.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.testing.tests/META-INF/MANIFEST.MF
@@ -13,8 +13,8 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";visibility:=reexport,
  org.junit;bundle-version="4.13.2",
  org.eclipse.xtend.lib;bundle-version="2.38.0",
  org.eclipse.xtext.testing;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
- org.apache.log4j.spi;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26",
+ org.apache.log4j.spi;version="1.2.26"
 Bundle-ActivationPolicy: lazy
 Automatic-Module-Name: org.eclipse.xtext.testing
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.testing/META-INF/MANIFEST.MF b/org.eclipse.xtext.testing/META-INF/MANIFEST.MF
index 2a3198d96ee..139cabf607b 100644
--- a/org.eclipse.xtext.testing/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.testing/META-INF/MANIFEST.MF
@@ -24,8 +24,8 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";visibility:=reexport,
  org.eclipse.lsp4j.jsonrpc;bundle-version="[0.23.1,0.24.0)";resolution:=optional,
  org.junit;bundle-version="4.13.2",
  org.eclipse.xtend.lib;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
- org.apache.log4j.spi;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
+ org.apache.log4j.spi;version="1.2.26",
  org.junit.jupiter.api;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.extension;version="[5.1.0,6.0.0)",
  org.junit.jupiter.api.function;version="[5.1.0,6.0.0)",
diff --git a/org.eclipse.xtext.testlanguages.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.testlanguages.ui/META-INF/MANIFEST.MF
index ac6770bea85..e0684b08b31 100644
--- a/org.eclipse.xtext.testlanguages.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.testlanguages.ui/META-INF/MANIFEST.MF
@@ -23,7 +23,7 @@ Require-Bundle: org.eclipse.xtext.testlanguages;bundle-version="2.38.0";visibili
  org.eclipse.xtext.testing;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.testing;bundle-version="2.38.0",
  org.eclipse.xtext.ui.testing;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.hamcrest.core,
  org.junit;version="4.13.2",
  org.junit.runners.model;version="4.13.2",
diff --git a/org.eclipse.xtext.testlanguages/META-INF/MANIFEST.MF b/org.eclipse.xtext.testlanguages/META-INF/MANIFEST.MF
index 64de9d1e328..ebaf8dd2024 100644
--- a/org.eclipse.xtext.testlanguages/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.testlanguages/META-INF/MANIFEST.MF
@@ -15,7 +15,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtend.lib;bundle-version="2.38.0",
  org.eclipse.xtext.testing;bundle-version="2.38.0",
  org.eclipse.xtext.common.types;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.hamcrest.core,
  org.junit;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtext.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.tests/META-INF/MANIFEST.MF
index cd497746714..8b237900945 100644
--- a/org.eclipse.xtext.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.tests/META-INF/MANIFEST.MF
@@ -28,7 +28,7 @@ Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: lib/simple.jar,
  .
 Import-Package: org.apache.commons.logging;version="1.2.0",
- org.apache.log4j;version="1.2.24"
+ org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext;version="2.38.0",
  org.eclipse.xtext.actions;version="2.38.0",
  org.eclipse.xtext.build;version="2.38.0",
diff --git a/org.eclipse.xtext.ui.codetemplates.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.codetemplates.ui/META-INF/MANIFEST.MF
index 60b56875dde..3b9205b3546 100644
--- a/org.eclipse.xtext.ui.codetemplates.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.codetemplates.ui/META-INF/MANIFEST.MF
@@ -22,7 +22,7 @@ Require-Bundle: org.eclipse.xtext.ui.codetemplates;bundle-version="2.38.0";visib
  org.eclipse.compare;bundle-version="3.10.0",
  org.eclipse.xtend.lib;bundle-version="2.38.0";resolution:=optional,
  org.eclipse.xtext.xbase.lib;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.ui.codetemplates.ui;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui.tests",
  org.eclipse.xtext.ui.codetemplates.ui.contentassist;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui.tests",
diff --git a/org.eclipse.xtext.ui.codetemplates/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.codetemplates/META-INF/MANIFEST.MF
index ffe4632c302..4f397b6bc62 100644
--- a/org.eclipse.xtext.ui.codetemplates/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.codetemplates/META-INF/MANIFEST.MF
@@ -13,7 +13,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
  org.eclipse.xtend.lib;bundle-version="2.38.0"
 Import-Package: org.apache.commons.logging,
- org.apache.log4j;version="1.2.24"
+ org.apache.log4j;version="1.2.26"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.ui.codetemplates;version="2.38.0";x-friends:="org.eclipse.xtext.ui.codetemplates.ide,org.eclipse.xtext.ui.codetemplates.ui",
  org.eclipse.xtext.ui.codetemplates.conversion;version="2.38.0";x-internal:=true,
diff --git a/org.eclipse.xtext.ui.ecore/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.ecore/META-INF/MANIFEST.MF
index 3282aa7daee..c53dd37fdfe 100644
--- a/org.eclipse.xtext.ui.ecore/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.ecore/META-INF/MANIFEST.MF
@@ -15,6 +15,6 @@ Require-Bundle: org.eclipse.ui;bundle-version="3.205.100",
  org.eclipse.emf.ecore.editor;bundle-version="2.18.0"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext.ui.ecore;version="2.38.0"
 Automatic-Module-Name: org.eclipse.xtext.ui.ecore
diff --git a/org.eclipse.xtext.ui.shared/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.shared/META-INF/MANIFEST.MF
index 81c6b53a519..4d1fb7dd501 100644
--- a/org.eclipse.xtext.ui.shared/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.shared/META-INF/MANIFEST.MF
@@ -18,5 +18,5 @@ Bundle-ActivationPolicy: lazy
 Export-Package: org.eclipse.xtext.ui.shared;version="2.38.0",
  org.eclipse.xtext.ui.shared.internal;version="2.38.0";x-friends:="org.eclipse.xtext.builder.tests,
    org.eclipse.xtext.ui.tests"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.ui.shared
diff --git a/org.eclipse.xtext.ui.testing/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.testing/META-INF/MANIFEST.MF
index 1c224f0c98a..c6a69246e3a 100644
--- a/org.eclipse.xtext.ui.testing/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.testing/META-INF/MANIFEST.MF
@@ -7,7 +7,7 @@ Bundle-Vendor: Eclipse Xtext
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: org.eclipse.xtext.ui.testing;version="2.38.0",
  org.eclipse.xtext.ui.testing.util;version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24";resolution:=optional,
+Import-Package: org.apache.log4j;version="1.2.26";resolution:=optional,
  org.junit;version="4.13.2",
  org.junit.internal;version="4.13.2",
  org.junit.internal.builders;version="4.13.2",
diff --git a/org.eclipse.xtext.ui.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui.tests/META-INF/MANIFEST.MF
index 577a77cbfdd..a158c20251f 100644
--- a/org.eclipse.xtext.ui.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui.tests/META-INF/MANIFEST.MF
@@ -31,7 +31,7 @@ Require-Bundle: org.eclipse.xtext.ui;bundle-version="2.38.0",
 Bundle-Activator: org.eclipse.xtext.ui.tests.internal.TestsActivator
 Bundle-ActivationPolicy: lazy
 Bundle-Vendor: Eclipse Xtext
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.junit;version="4.13.2"
 Export-Package: org.eclipse.xtext.ui.tests;version="2.38.0",
  org.eclipse.xtext.ui.tests.editor.bracketmatching;version="2.38.0",
diff --git a/org.eclipse.xtext.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.ui/META-INF/MANIFEST.MF
index c0e6399bddd..2fa64da9cfb 100644
--- a/org.eclipse.xtext.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.ui/META-INF/MANIFEST.MF
@@ -153,5 +153,5 @@ Export-Package: org.eclipse.xtext.common.ui.contentassist;version="2.38.0",
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
 Bundle-Vendor: %providerName
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.ui
diff --git a/org.eclipse.xtext.util/META-INF/MANIFEST.MF b/org.eclipse.xtext.util/META-INF/MANIFEST.MF
index 3fe9eb60035..2d58519fd1f 100644
--- a/org.eclipse.xtext.util/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.util/META-INF/MANIFEST.MF
@@ -51,6 +51,6 @@ Require-Bundle: org.eclipse.emf.ecore;bundle-version="2.36.0",
  com.google.guava.failureaccess;bundle-version="[1.0.2,2.0.0)";visibility:=reexport,
  jakarta.inject.jakarta.inject-api;bundle-version="2.0.1";resolution:=optional;visibility:=reexport;x-installation:=greedy,
  org.eclipse.xtend.lib;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.util
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.xbase.testing/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase.testing/META-INF/MANIFEST.MF
index 6713ea858c9..dc20fcd1cc7 100644
--- a/org.eclipse.xtext.xbase.testing/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase.testing/META-INF/MANIFEST.MF
@@ -19,6 +19,6 @@ Export-Package: org.eclipse.xtext.xbase.testing;version="2.38.0",
  testdata;version="2.38.0";x-friends:="org.eclipse.xtext.xbase.tests,org.eclipse.xtend.core.tests",
  testdata.a;version="2.38.0";x-internal:=true,
  testdata.b;version="2.38.0";x-internal:=true
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.xbase.testing
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.xbase.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase.tests/META-INF/MANIFEST.MF
index dfee6a41788..a8c76b0267f 100644
--- a/org.eclipse.xtext.xbase.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase.tests/META-INF/MANIFEST.MF
@@ -23,7 +23,7 @@ Export-Package: org.eclipse.xtext.xbase.tests;version="2.38.0",
 Import-Package: jakarta.inject;version="2.0.0",
  org.aopalliance.aop;version="[1.0.0,2.0.0)",
  org.aopalliance.intercept;version="[1.0.0,2.0.0)",
- org.apache.log4j;version="1.2.24",
+ org.apache.log4j;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.rules;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtext.xbase.ui.testing/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase.ui.testing/META-INF/MANIFEST.MF
index 6dcc02d8b2e..1a87c60d9eb 100644
--- a/org.eclipse.xtext.xbase.ui.testing/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase.ui.testing/META-INF/MANIFEST.MF
@@ -15,6 +15,6 @@ Require-Bundle: org.eclipse.xtext.xbase.lib;bundle-version="2.38.0";visibility:=
 Export-Package: org.eclipse.xtext.xbase.ui.testing;version="2.38.0";x-friends:="org.eclipse.xtext.xbase.ui.tests"
 Bundle-Name: %pluginName
 Bundle-Vendor: %providerName
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.junit;version="[4.0.0,5.0.0)"
 Automatic-Module-Name: org.eclipse.xtext.xbase.ui.testing
diff --git a/org.eclipse.xtext.xbase.ui.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase.ui.tests/META-INF/MANIFEST.MF
index 0a64794bb2a..e31f211a0c9 100644
--- a/org.eclipse.xtext.xbase.ui.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase.ui.tests/META-INF/MANIFEST.MF
@@ -25,7 +25,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.ui.testing;bundle-version="2.38.0",
  org.eclipse.xtext.testing;bundle-version="2.38.0",
  org.eclipse.xtext.xbase.testing;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.junit;version="4.13.2",
  org.junit.runner;version="4.13.2",
  org.junit.runners;version="4.13.2"
diff --git a/org.eclipse.xtext.xbase.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase.ui/META-INF/MANIFEST.MF
index e3f4ee6bbbd..0f525bb0dc9 100644
--- a/org.eclipse.xtext.xbase.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase.ui/META-INF/MANIFEST.MF
@@ -33,7 +33,7 @@ Require-Bundle: org.eclipse.xtext.xbase;bundle-version="2.38.0";visibility:=reex
  org.eclipse.xtend.lib;bundle-version="2.38.0"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-Activator: org.eclipse.xtext.xbase.ui.internal.XbaseActivator
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext.xbase.annotations.ui;version="2.38.0";x-internal:=true,
  org.eclipse.xtext.xbase.annotations.ui.contentassist;version="2.38.0";x-friends:="org.eclipse.xtend.ide",
  org.eclipse.xtext.xbase.annotations.ui.labeling;version="2.38.0";x-internal:=true,
diff --git a/org.eclipse.xtext.xbase/META-INF/MANIFEST.MF b/org.eclipse.xtext.xbase/META-INF/MANIFEST.MF
index 28fb1107706..cf93f9df2c6 100644
--- a/org.eclipse.xtext.xbase/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xbase/META-INF/MANIFEST.MF
@@ -210,6 +210,6 @@ Export-Package: org.eclipse.xtext.xbase;version="2.38.0",
  org.eclipse.xtext.xtype;version="2.38.0",
  org.eclipse.xtext.xtype.impl;version="2.38.0";x-friends:="org.eclipse.xtend.core",
  org.eclipse.xtext.xtype.util;version="2.38.0";x-friends:="org.eclipse.xtend.core,org.eclipse.xtext.xbase.tests"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.xbase
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.xtext.generator.dependencies/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.generator.dependencies/META-INF/MANIFEST.MF
index ba7af9fa6cc..b556d5024b1 100644
--- a/org.eclipse.xtext.xtext.generator.dependencies/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.generator.dependencies/META-INF/MANIFEST.MF
@@ -16,6 +16,6 @@ Require-Bundle: de.itemis.xtext.antlr;bundle-version="2.0.0";resolution:=optiona
  org.eclipse.emf.mwe2.lib;bundle-version="2.21.0";visibility:=reexport,
  org.objectweb.asm;bundle-version="[9.7.1,9.8.0)";visibility:=reexport,
  org.apache.commons.commons-logging;bundle-version="1.3.4";visibility:=reexport,
- org.apache.log4j;bundle-version="1.2.24";visibility:=reexport
+ org.apache.log4j;bundle-version="1.2.26";visibility:=reexport
 Automatic-Module-Name: org.eclipse.xtext.xtext.generator.dependencies
 Eclipse-SourceReferences: eclipseSourceReferences
diff --git a/org.eclipse.xtext.xtext.generator/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.generator/META-INF/MANIFEST.MF
index 0d5a1aa1279..3001ae5373c 100644
--- a/org.eclipse.xtext.xtext.generator/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.generator/META-INF/MANIFEST.MF
@@ -19,7 +19,7 @@ Require-Bundle: org.eclipse.xtext;bundle-version="2.38.0";x-installation:=greedy
  de.itemis.xtext.antlr;bundle-version="2.0.0";resolution:=optional;visibility:=reexport,
  org.eclipse.jdt.core;bundle-version="3.37.0";resolution:=optional,
  com.google.gson;bundle-version="2.10.1";resolution:=optional
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext.xtext.generator;version="2.38.0",
  org.eclipse.xtext.xtext.generator.builder;version="2.38.0",
  org.eclipse.xtext.xtext.generator.ecore;version="2.38.0",
diff --git a/org.eclipse.xtext.xtext.ide/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.ide/META-INF/MANIFEST.MF
index 5762c804516..c89fa377ecc 100644
--- a/org.eclipse.xtext.xtext.ide/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.ide/META-INF/MANIFEST.MF
@@ -7,7 +7,7 @@ Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
 Bundle-Vendor: Eclipse Xtext
 Require-Bundle: org.eclipse.xtext.ide;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Export-Package: org.eclipse.xtext.xtext.ide;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui",
  org.eclipse.xtext.xtext.ide.contentassist.antlr;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui",
  org.eclipse.xtext.xtext.ide.contentassist.antlr.internal;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui"
diff --git a/org.eclipse.xtext.xtext.ui.tests/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.ui.tests/META-INF/MANIFEST.MF
index f4d665a2cc3..b3b29b9c78f 100644
--- a/org.eclipse.xtext.xtext.ui.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.ui.tests/META-INF/MANIFEST.MF
@@ -28,7 +28,7 @@ Require-Bundle: org.eclipse.emf.ecore;bundle-version="2.36.0",
  org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
  org.eclipse.xtext.builder;bundle-version="2.38.0",
  org.eclipse.xtext.ui.codetemplates.ui;bundle-version="2.38.0"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.hamcrest.core,
  org.junit;version="4.13.2",
  org.junit.runner;version="4.13.2",
diff --git a/org.eclipse.xtext.xtext.ui/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.ui/META-INF/MANIFEST.MF
index b86cc94d431..01f6c9c6ce9 100644
--- a/org.eclipse.xtext.xtext.ui/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.ui/META-INF/MANIFEST.MF
@@ -49,5 +49,5 @@ Export-Package: org.eclipse.xtext.ui.editor.hierarchy;version="2.38.0";x-friends
  org.eclipse.xtext.xtext.ui.refactoring;version="2.38.0";x-internal:=true,
  org.eclipse.xtext.xtext.ui.wizard.ecore2xtext;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui.tests",
  org.eclipse.xtext.xtext.ui.wizard.project;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui.tests"
-Import-Package: org.apache.log4j;version="1.2.24"
+Import-Package: org.apache.log4j;version="1.2.26"
 Automatic-Module-Name: org.eclipse.xtext.xtext.ui
diff --git a/org.eclipse.xtext.xtext.wizard/META-INF/MANIFEST.MF b/org.eclipse.xtext.xtext.wizard/META-INF/MANIFEST.MF
index 3b5b4e3b87c..99b4a85903d 100644
--- a/org.eclipse.xtext.xtext.wizard/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext.xtext.wizard/META-INF/MANIFEST.MF
@@ -9,7 +9,7 @@ Export-Package: gradlew;version="2.38.0";x-internal:=true,
  org.eclipse.xtext.xtext.wizard;version="2.38.0";x-friends:="org.eclipse.xtext.tests,org.eclipse.xtext.xtext.ui,org.eclipse.xtext.xtext.ui.tests",
  org.eclipse.xtext.xtext.wizard.cli;version="2.38.0";x-friends:="org.eclipse.xtext.tests",
  org.eclipse.xtext.xtext.wizard.ecore2xtext;version="2.38.0";x-friends:="org.eclipse.xtext.xtext.ui,org.eclipse.xtext.xtext.ui.tests"
-Import-Package: org.apache.log4j;version="1.2.24",
+Import-Package: org.apache.log4j;version="1.2.26",
  org.kohsuke.args4j;version="2.33.0",
  org.kohsuke.args4j.spi;version="2.33.0"
 Require-Bundle: org.eclipse.xtext.xbase.lib;bundle-version="2.38.0",
diff --git a/org.eclipse.xtext/META-INF/MANIFEST.MF b/org.eclipse.xtext/META-INF/MANIFEST.MF
index c2620a65239..1bc71d220f5 100644
--- a/org.eclipse.xtext/META-INF/MANIFEST.MF
+++ b/org.eclipse.xtext/META-INF/MANIFEST.MF
@@ -213,7 +213,7 @@ Require-Bundle: org.eclipse.emf.ecore.xmi;bundle-version="2.37.0";visibility:=re
  org.eclipse.core.runtime;bundle-version="3.31.0";resolution:=optional;x-installation:=greedy,
  org.eclipse.xtend.lib;bundle-version="2.38.0",
  org.eclipse.equinox.common;bundle-version="3.19.0"
-Import-Package: org.apache.log4j;version="1.2.24",org.osgi.framework
+Import-Package: org.apache.log4j;version="1.2.26",org.osgi.framework
 Bundle-ActivationPolicy: lazy
 Bundle-Activator: org.eclipse.xtext.internal.Activator
 Automatic-Module-Name: org.eclipse.xtext