Input validation error in pnpm - #VU153391
Published: October 6, 2026
Vulnerability identifier: #VU153391
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper validation of record lengths in package archive PAX record processing when parsing a negative PAX record length. A remote attacker can supply a package archive containing such a record to cause a denial of service.
Processing the archive can cause pnpm to hang.
Affected software
pnpm
Remediation
Install security update from vendor's website.
pnpm - addressed in versions 11.28.5, 12.10.0