CVE-2026-70622

Name	CVE-2026-70622
Description	tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability in the Builder::append_dir_all() function that allows attackers to read files outside the intended source root directory by planting symlinks in an attacker-controlled directory. When a privileged process archives an untrusted directory, the function follows symlinks without verifying that resolved targets remain within the source root, causing out-of-bounds files to be included in the archive as regular files and disclosed to the attacker.
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	1144402

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-tar (PTS)	bookworm	0.4.38-1	vulnerable
	trixie	0.4.43-4	vulnerable
	forky, sid	0.4.45-2	vulnerable

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)	(unfixed)	unimportant		1144402

Notes

https://gist.github.com/thesmartshadow/e7dac0bb690ee17b9cc142154cb11726
Clarified as not in scope by upstream:
https://github.com/composefs/tar-rs/commit/cd94c46e0d74fbcc50eea3f30665a1b1159254cc