{"id":"CVE-2026-23889","state":"PUBLISHED","title":"pnpm has Windows-specific tarball Path Traversal","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.","publishedAt":"2026-01-26T21:50:55.289Z","updatedAt":"2026-01-27T21:40:36.271Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["pnpm pnpm"],"affected":[{"vendor":"pnpm","product":"pnpm","versions":[{"version":"< 10.28.1","status":"affected"}]}],"references":["https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p","https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0","https://github.com/pnpm/pnpm/releases/tag/v10.28.1"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23889.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23889","state":"PUBLISHED","datePublished":"2026-01-26T21:50:55.289Z","dateUpdated":"2026-01-27T21:40:36.271Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-16T21:02:02.902Z"},"containers":{"cna":{"title":"pnpm has Windows-specific tarball Path Traversal","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"pnpm","product":"pnpm","versions":[{"version":"< 10.28.1","status":"affected"}]}],"references":[{"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p","name":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0","name":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/releases/tag/v10.28.1","name":"https://github.com/pnpm/pnpm/releases/tag/v10.28.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-26T22:00:18.657Z"},"source":{"advisory":"GHSA-6x96-7vc8-cm3p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-27T21:40:27.399595Z","id":"CVE-2026-23889","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-27T21:40:36.271Z"}}]}}}