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CVE-2026-23889

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 overwr
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e5025f782e6a92110cb71b8f59a28bb1145039fabd5ddc1b27164f00afb7d9a8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"pnpm","vendor":"pnpm","versions":[{"status":"affected","version":"< 10.28.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0","tags":["x_refsource_MISC"],"url":"https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/references/1
{"name":"https://github.com/pnpm/pnpm/releases/tag/v10.28.1","tags":["x_refsource_MISC"],"url":"https://github.com/pnpm/pnpm/releases/tag/v10.28.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/references/2
{"name":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b5a576406a7121b5c4604e27a343aab1b64eb402f56b13c8b4bd0f53043fb17c · sha256:142a2f2e96b904ff… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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