{"id":"CVE-2026-23889","aliases":["GHSA-6x96-7vc8-cm3p"],"url":"https://o3.security/vulnerability/CVE-2026-23889","summary":"pnpm has Windows-specific tarball Path Traversal","details":"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.","published":"2026-01-26T21:50:55.289Z","modified":"2026-07-15T01:49:15.588064496Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"pnpm","fixedVersion":"10.28.1"}],"fix":{"url":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0","label":"pnpm/pnpm@6ca07ff"},"references":[{"type":"WEB","url":"https://github.com/pnpm/pnpm/releases/tag/v10.28.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23889.json"},{"type":"ADVISORY","url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23889"},{"type":"FIX","url":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:15.588064496Z"}}