PT-2026-26573 · Alexcrichton · Tar-Rs

Published 2026-03-20 · Updated 2026-03-20 · CVE-2026-33056

Mitre

CVSS v4.0

5.1

Medium

AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory — and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45.

Fix

Weakness Enumeration

CWE-61

Related Identifiers

CVE-2026-33056

Affected Products

Tar-Rs

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-33056 · Security Note
• https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446 · Note
• https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph · Note