CVE Watch28 oct 2026

CVE-2026-116795

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 LOOKBE

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 28 oct 2026 · Última mod.: 28 oct 2026 · CWE-407 · CWE-1333

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

Referencias oficiales

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