GHSA-FF84-5F28-78QJ re2: Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex` on a non-ASCII subject → uncatchable process crash (DoS)

Summary re2 validates the user-settable lastIndex against the subject's UTF-8 byte length but then uses it as a UTF-16 code-unit count to walk the subject buffer, with no bounds check. For any non-ASCII subject, the byte length is larger than the true character count, so a lastIndex between those...

CVE-2026-67550

re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII...

PT-2026-66604

Name of the Vulnerable Software and Affected Versions re2 versions prior to 1.25.2 Description The software validates lastIndex against the UTF-8 byte length of a subject but incorrectly uses it as a UTF-16 code-unit offset in the exec, test, match, replace, and split functions. When a non-ASCII...