UNIX Symbolic Link (Symlink) Following Affecting tar package, versions <0.4.45
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-TAR-15703420
- published20 Mar 2026
- disclosed20 Mar 2026
- creditSergei Zimmerman
Introduced: 20 Mar 2026
NewCVE-2026-33056 (opens in a new tab)How to fix?
Upgrade tar to version 0.4.45 or higher.
Overview
tar is a Rust implementation of a TAR file reader and writer. This library does not currently handle compression, but it is abstract over all I/O readers and writers. Additionally, great lengths are taken to ensure that the entire contents are never required to be entirely resident in memory all at once.
Affected versions of this package are vulnerable to UNIX Symbolic Link (Symlink) Following in the unpack_dir() function. An attacker can change the permissions of arbitrary directories outside the intended extraction root by crafting a tar archive containing a symbolic link followed by a directory entry with the same name, causing the process to follow the symlink and apply permission changes to the symlink target.