CVE-2026-23889 (GCVE-0-2026-23889)
Vulnerability from cvelistv5 – Published: 2026-01-26 21:50 – Updated: 2026-01-27 21:40
VLAI
EPSS
VEX
Title
pnpm has Windows-specific tarball Path Traversal
Summary
pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's tarball extraction allows malicious packages to write files outside the package directory on Windows. The path normalization only checks for `./` but not `.\`. On Windows, backslashes are directory separators, enabling path traversal. This vulnerability is Windows-only. This issue impacts Windows pnpm users and Windows CI/CD pipelines (GitHub Actions Windows runners, Azure DevOps). It can lead to overwriting `.npmrc`, build configs, or other files. Version 10.28.1 contains a patch.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-27 21:40 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/pnpm/pnpm/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0… | x_refsource_MISC |
| https://github.com/pnpm/pnpm/releases/tag/v10.28.1 | x_refsource_MISC |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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