CVE-2026-23889 - pnpm has Windows-specific tarball Path Traversal

CVE-2026-23889 - pnpm has Windows-specific tarball Path Traversal

https://cvefeed.io/rssfeed/latest.atom / Tue, 01/27/2026 - 01:59
CVE ID : CVE-2026-23889
Published : Jan. 26, 2026, 10:15 p.m. | 1 hour, 29 minutes ago
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.
Severity: 6.5 | MEDIUM
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