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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
micromatch picomatch unaffected
Version Status Constraints
0 affected ≤ 4.0.7

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/micromatch/picomatch/blob/4.0.7/lib/parse.js#L287-L307 cve-icon cve-icon
https://github.com/micromatch/picomatch/pull/194 cve-icon cve-icon
https://www.vulncheck.com/advisories/picomatch-through-4.0.7-redos-via-single-branch-repeated-extglob-patterns cve-icon cve-icon
History

Mon, 19 Oct 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Micromatch
Micromatch picomatch
Vendors & Products Micromatch
Micromatch picomatch

Mon, 19 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Picomatch through 4.0.7 ReDoS via single-branch repeated extglob patterns
First Time appeared Jonschlinkert
Jonschlinkert picomatch
Weaknesses CWE-1333
CPEs cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:*:*:*
Vendors & Products Jonschlinkert
Jonschlinkert picomatch
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T16:40:19.321Z

Reserved: 2026-10-19T15:20:39.194Z

Link: CVE-2026-112366

cve-icon Vulnrichment

Updated: 2026-10-19T16:40:12.896Z

cve-icon NVD

Status : Received

Published: 2026-10-19T16:17:07.500

Modified: 2026-10-19T17:17:16.010

Link: CVE-2026-112366

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T19:45:02Z

Weaknesses