Path traversal in pnpm - #VU140786
Published: August 3, 2026
Vulnerability identifier: #VU140786
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to modify files outside the intended project directory.
The vulnerability exists due to path traversal in pacquet trust-lockfile install handling when processing a crafted lockfile alias during installation. A remote attacker can supply a crafted lockfile that causes dependency symlinks to be created outside the intended project or node_modules boundary to modify files outside the intended project directory.
User interaction is required to run installation with --trust-lockfile or a frozen lockfile.
Affected software
pnpm
Remediation
Install security update from vendor's website.
pnpm - update to 12.0.0 alpha.5