CVE-2026-116795
highRE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matching.
RE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matching. From 2.2.0 until 2.8.7, enabling LOOKBEHINDS and using repeated matching through matcher().find(), matchAll(), split(), or matcher().replaceAll() can cause quadratic total work. Machine.match restarts lookbehind scanning from offset zero for each requested start position, while Matcher-based APIs request capture slots that prevent the early exit used for captureless matching. Dense matches therefore repeatedly rescan the input, allowing attacker-influenced text to monopolize a single-threaded worker and deny service. This issue is fixed in version 2.8.7.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/le0pard/re2js/commit/dfdd947785dfa113bdc97416375c246a39458395 security-advisories@github.com
- https://github.com/le0pard/re2js/pull/59 security-advisories@github.com
- https://github.com/le0pard/re2js/releases/tag/2.8.7 security-advisories@github.com
- https://github.com/le0pard/re2js/security/advisories/GHSA-gg6h-894w-4m9c security-advisories@github.com