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CVE-2026-23745 PoC — node-tar Vulnerable to Arbitrary File Overwrite and Symlink Poisoning via Insufficient Path Sanitization

Source
https://github.com/Jvr2022/CVE-2026-23745
Associated Vulnerability
Title:node-tar Vulnerable to Arbitrary File Overwrite and Symlink Poisoning via Insufficient Path Sanitization (CVE-2026-23745)
Description: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.
Description
Proof of Concept for CVE-2026-23745: Arbitrary File Overwrite vulnerability in node-tar (versions < 7.5.3).
File Snapshot

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