CVE-2026-27904: Minimatch Project Minimatch

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4, nested `*()` extglobs produce regexps with nested unbounded quantifiers (e.g. `(?:(?:a|b)*)*`), which exhibit catastrophic backtracking in V8. With a 12-byte pattern `*(*(*(a|b)))` and an 18-byte non-matching input, `minimatch()` stalls for over 7 seconds. Adding a single nesting level or a few input characters pushes this to minutes. This is the most severe finding: it is triggered by the default `minimatch()` API with no special options, and the minimum viable pattern is only 12 bytes. The same issue affects `+()` extglobs equally. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4 fix the issue.

Affected products

• Minimatch Project Minimatch: before 3.1.4 (fixed in 3.1.4); from 4.0.0, before 4.2.5 (fixed in 4.2.5); from 5.0.0, before 5.1.8 (fixed in 5.1.8); from 6.0.0, before 6.2.2 (fixed in 6.2.2); from 7.0.0, before 7.4.8 (fixed in 7.4.8); from 8.0.0, before 8.0.6 (fixed in 8.0.6); …

Published 2026-02-26. Last modified 2026-06-17.