AIKIDO-2026-414442
tar-fs is vulnerable to Path Traversal
48
Medium Risk
This Affects:
tar-fsTL;DR
The package’s tar extraction logic previously allowed crafted archives to escape the intended extraction directory (CWD) via path traversal and symlink tricks (including when using opts.strip), and could write through pre-existing symlinks. The patch adds explicit root-escape guards, rejects escaping symlinks, avoids following existing symlinks, and strips special permission bits (setuid/setgid/sticky) from extracted entries.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
tar-fs is vulnerable to Path Traversal in versions 3.0.0 - 3.1.2 and 0.5.1 - 2.1.4.
How to fix this
Upgrade the tar-fs library to the patch version.
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SOC 2Compliant
ISO 27001Compliant