RUSTSEC-2026-0113: `unpack_in` can chmod arbitrary directories by following symlinks

[xtqqczze]

unpack_in can chmod arbitrary directories by following symlinks

Details
Package	astral-tokio-tar
Version	0.6.0
URL	https://github.com/advisories/GHSA-xx64-wwv2-hcqq
Date	2026-04-27
Patched versions	>=0.6.1

In versions 0.6.0 and earlier of astral-tokio-tar, the unpack_in API could
inadvertently modify the permissions of external (i.e. non-archive) directories
outside of the archive. An attacker could use this to contrite a tar archive
that maliciously changes directory permissions outside of its intended
hierarchy. This flaw only affects directories; individual file permissions
cannot be modified via it.

See GHSA-j4xf-2g29-59ph for the equivalent flaw in the tar crate.

See advisory page for additional details.