{"id":"CVE-2026-23888","aliases":["GHSA-6pfh-p556-v868"],"url":"https://o3.security/vulnerability/CVE-2026-23888","summary":"pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)","details":"pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's binary fetcher allows malicious packages to write files outside the intended extraction directory. The vulnerability has two attack vectors: (1) Malicious ZIP entries containing `../` or absolute paths that escape the extraction root via AdmZip's `extractAllTo`, and (2) The `BinaryResolution.prefix` field is concatenated into the extraction path without validation, allowing a crafted prefix like `../../evil` to redirect extracted files outside `targetDir`. The issue impacts all pnpm users who install packages with binary assets, users who configure custom Node.js binary locations and CI/CD pipelines that auto-install binary dependencies. It can lead to overwriting config files, scripts, or other sensitive files leading to RCE. Version 10.28.1 contains a patch.","published":"2026-01-26T21:37:17.483Z","modified":"2026-07-15T01:48:56.329873512Z","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/5c382f0ca3b7cc49963b94677426e66539dcb3f5","label":"pnpm/pnpm@5c382f0"},"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-2026-23888.json"},{"type":"ADVISORY","url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-6pfh-p556-v868"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23888"},{"type":"FIX","url":"https://github.com/pnpm/pnpm/commit/5c382f0ca3b7cc49963b94677426e66539dcb3f5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:56.329873512Z"}}