node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.
[POC] CVE-2026-23745 — CVE-2026-23745
Proof of Concept for CVE-2026-23745: Arbitrary File Overwrite vulnerability in node-tar (versions < 7.5.3).
[POC] CVE-2026-23745 — node-tar-cve-demo
Mirror of isaacs/node-tar pinned at 8bb83f7 — the commit before the CVE-2026-23745 fix. Demo target for autonomous vulnerability patching. Do not install from here; use node-tar 7.5.3+.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
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