CVE-2026-33056

Name	CVE-2026-33056
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1131481

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-tar (PTS)	bullseye	0.4.26-1	vulnerable
	bookworm	0.4.38-1	vulnerable
	trixie	0.4.43-4	vulnerable
	forky, sid	0.4.45-2	fixed
rustc (PTS)	bullseye	1.48.0+dfsg1-2	vulnerable
	bookworm	1.63.0+dfsg1-2	vulnerable
	trixie	1.85.0+dfsg3-1	vulnerable
	forky	1.92.0+dfsg1-2	fixed
	sid	1.93.1+dfsg1-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-tar	source	(unstable)	0.4.45-1			1131481
rustc	source	(unstable)	1.92.0+dfsg1-2

Notes

https://rustsec.org/advisories/RUSTSEC-2026-0067.html
https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph
Fixed by: https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446 (0.4.45)