CVE-2026-27904: high-severity vulnerability in isaacs minimatch
minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
isaacs · minimatchRelated CVEs — isaacs minimatch
In the same product, most dangerous first.
CVE-2026-26996HIGHminimatch has a ReDoS via repeated wildcards with non-matching literal in patternEPSS 0.6%CVE-2026-27903HIGHminimatch has a ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segmentsEPSS 0.6%CVE-2026-118764MEDIUMminimatch: potential denial of service via globparts amplificationEPSS 0.3%