---
id: CVE-2026-112366
title: Picomatch through 4.0.7 ReDoS via single-branch repeated extglob patterns
summary: >-
  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), whi…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-1333
vendor: micromatch
product: picomatch
affected:
  - picomatch <= 4.0.7
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-19T16:40:06.341512Z'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T16:40:19.321Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112366'
references:
  - url: 'https://github.com/micromatch/picomatch/pull/194'
  - url: 'https://github.com/micromatch/picomatch/blob/4.0.7/lib/parse.js#L287-L307'
  - url: >-
      https://www.vulncheck.com/advisories/picomatch-through-4.0.7-redos-via-single-branch-repeated-extglob-patterns
    label: >-
      VulnCheck Advisory: Picomatch through 4.0.7 ReDoS via single-branch
      repeated extglob patterns
tags:
  - cve.org
ingestedAt: '2026-10-19T16:32:30.079Z'
---

## Overview

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.

## Affected

- `picomatch <= 4.0.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.