Description
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.
References (3)
Core 3
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p
Patch x_refsource_misc
https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0
Patch x_refsource_misc
https://github.com/pnpm/pnpm/releases/tag/v10.28.1
Scores
CVSS v3
6.5
EPSS
0.0002
EPSS Percentile
4.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-22
Status
published
Products (2)
npm/pnpm
0 - 10.28.1npm
pnpm/pnpm
< 10.28.1
Published
Jan 26, 2026
Tracked Since
Feb 18, 2026