{"id":"CVE-2026-26960","aliases":["GHSA-83g3-92jg-28cx"],"url":"https://o3.security/vulnerability/CVE-2026-26960","summary":"node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction","details":"node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.","published":"2026-02-20T01:07:52.979Z","modified":"2026-08-07T11:50:49.746258886Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"tar","fixedVersion":"7.5.8"}],"fix":{"url":"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384","label":"isaacs/node-tar@2cb1120"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26960.json"},{"type":"ADVISORY","url":"https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26960"},{"type":"FIX","url":"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384"},{"type":"FIX","url":"https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:49.746258886Z"}}