Inefficient regular expression complexity in picomatch - CVE-2026-33671
Published: July 26, 2026
Vulnerability identifier: #VU139384
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-33671
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: micromatch
Affected software:
picomatch
picomatch
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in extglob quantifier handling when parsing input. A remote attacker can send a specially crafted pattern to cause a denial of service.
How to mitigate CVE-2026-33671
Install security update from vendor's website.