Bug 2433093 (CVE-2026-23889) - CVE-2026-23889 pnpm: pnpm: Arbitrary file write via path traversal on Windows
Summary: CVE-2026-23889 pnpm: pnpm: Arbitrary file write via path traversal on Windows
Keywords:
Status: NEW
Alias: CVE-2026-23889
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-26 22:02 UTC by OSIDB Bzimport
Modified: 2026-01-27 04:47 UTC (History)
20 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-01-26 22:02:04 UTC 
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, Windows CI/CD pipelines (GitHub Actions Windows runners, Azure DevOps), and those who can overwrite `.npmrc`, build configs, or other files. Version 10.28.1 contains a patch.
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