6.9.6 Release Candidate 1

• In a Unix environment, if you have the POSIX API enabled in an earlier versio
  n (disabled by default in 6.9.5) and you need application binary compatibility
  with the POSIX API, specify "--enable-binary-compatible-posix-api=yes" instead
  of "--enable-posix-api=yes". "--enable-posix-api=yes" only supports source-lev
  el compatibility for POSIX API since 6.9.6.
• NEW: configure option --enable-binary-compatible-posix-api=[yes/no]
• NEW API: Limiting the maximum number of calls of subexp-call
• NEW API: ONIG_OPTION_NOT_BEGIN_STRING / NOT_END_STRING / NOT_BEGIN_POSITION
• Fixed behavior of ONIG_OPTION_NOTBOL / NOTEOL
• Fixed many problems found by OSS-Fuzz
• Fixed many problems found by Coverity
• Fixed CVE-2020-26159

Release 6.9.5 revised 1

• Fixed Issue #192
• onig-6.9.5_rev1.tar.gz and onig-6.9.5-rev1.tar.gz are exactly the same thing.(It has been added to match the tag name)

Release 6.9.5

• (Same as Release Candidate 2)
• POSIX API disabled by default for Unix (* Enabled by: configure --enable-posix-api=yes)
• Update Unicode version 13.0.0
• NEW: Code point sequence notation \x{HHHH HHHH ...}, \o{OOOO OOOO ...}
• NEW API: retry limit in search functions
• NEW API: maximum nesting level of subexp call
• Fixed behavior of isolated options in Perl and Java syntaxes. /...(?i).../

6.9.5 Release Candidate 2

• fix a problem (found by oss-fuzz test on my PC)

6.9.5 Release Candidate 1

• POSIX API disabled by default for Unix (* Enabled by: configure --enable-posix-api=yes)
• Update Unicode version 13.0.0
• NEW: Code point sequence notation \x{HHHH HHHH ...}, \o{OOOO OOOO ...}
• NEW API: retry limit in search functions
• NEW API: maximum nesting level of subexp call
• Fixed behavior of isolated options in Perl and Java syntaxes. /...(?i).../

Release 6.9.4

• (Almost same as Release Candidate 3)
• NEW API: RegSet (set of regexes)
• Fixed CVE-2019-19012
• Fixed CVE-2019-19203 (Does not affect UTF-8, UTF-16 and UTF-32 encodings)
• Fixed CVE-2019-19204 (Affects only PosixBasic, Emacs and Grep syntaxes)
• Fixed CVE-2019-19246
• Fixed some problems (found by libFuzzer test)

6.9.4 Release Candidate 3

• fixed a problem found by libFuzzer test

6.9.4 Release Candidate 2

• fix #164: Integer overflow related to reg->dmax in search_in_range()
• fix #163: heap-buffer-overflow in gb18030_mbc_enc_len()
• fix #162: heap-buffer-overflow in fetch_interval_quantifier()

6.9.4 Release Candidate 1

• NEW API: RegSet (set of regexes)
• Fixed some problems (found by libFuzzer test)

Release 6.9.3 (security fix release)

• Fixed CVE-2019-13224
• Fixed CVE-2019-13225
• Fixed many problems (found by libfuzzer programs)