TI-2026-76508 Aliases CVE-2026-112366 GHSA-fc5q-39xc-vjpf

ReDoS in Picomatch via single-branch repeated extglob patterns

MEDIUM 44CWE-1333Published 2026-10-19 · Updated 2026-10-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-1333.

Summary

Picomatch from 0 through 4.0.7 contains an inefficient regular expression flaw (CWE-1333) in how it analyzes repeated extglob patterns. A remote attacker who can supply glob patterns to a Node.js application can block the event loop with short crafted strings, causing denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00335 26th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
micromatch	picomatch	up to 4.0.7	—	No fix listed	CNA

picomatch Vendormicromatch Affected up to 4.0.7 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for picomatch. Red Hat lists Red Hat Hardened Images as affected, with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Hardened Images	Affected	No fix yet

Not affected: 1 product

Red Hat Hardened Images

Timeline

2026-10-19 Threatist record created from CVE-2026-112366
2026-10-20 Alias added: GHSA-fc5q-39xc-vjpf
2026-10-20 Affected versions changed · Red Hat
2026-10-20 CVSS score added · Red Hat

References

Patch 1

https://github.com/micromatch/picomatch/pull/194

Other 1

https://github.com/micromatch/picomatch/blob/4.0.7/lib/parse.js#L287-L307

TI-2025-19206 An issue in parse-git-config v.3.0.0 allows an attacker to obtain sensitive information via the expandKeys function CVSS 3.1HIGH 7.5
TI-2026-63098 braces through 3.0.3 Stack Overflow via Deeply Nested Patterns CVSS 4.0HIGH 8.7
TI-2024-03788 Memory Exhaustion in braces CVSS 3.1HIGH 7.5
TI-2026-26051 Picomatch has a ReDoS vulnerability via extglob quantifiers CVSS 3.1HIGH 7.5
TI-2025-35514 toggle-array is a package designed to enables a property on the object at the specified… CVSS 3.1HIGH 7.5
TI-2024-03787 Regular Expression Denial of Service in micromatch CVSS 3.1MEDIUM 5.3

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences