Vulnerability in Micromatch Picomatch
CVE-2026-112366
Picomatch through 4.0.7 contains a regular expression denial of service vulnerability that allows attackers to block the event loop by supplying single-branch repeated extglob patterns. Attackers can provide globs like +(*) or +(*a), which analyzeRepeatedExtglob in lib/parse.js skips, causing exponential backtracking against short crafted strings and denying service to Node.js applications.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/micromatch/picomatch/pull/194 (issue-tracking, patch)
- github.com/micromatch/picomatch/blob/4.0.7/lib/parse.js (technical-description)
- www.vulncheck.com/advisories/picomatch-through-4.0.7-redos-via-single-branch-re… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112366?
- CVE-2026-112366 is a high-severity vulnerability in Micromatch Picomatch, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2026-10-19.
- How severe is CVE-2026-112366?
- High severity. CVSS v3 base score is 7.5 out of 10.