CVE-2026-6968

EUVD-2026-25629

24.04.2026, 20:16

Incomplete path traversal fixes in awslabs/tough before tough-v0.22.0 allow remote authenticated users with delegated signing authority to write files outside intended output directories via absolute target names in copy_target/link_target, symlinked parent directories in save_target, or symlinked metadata filenames in SignedRole::write, because write paths trust the joined destination path without post-resolution containment verification.

We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

Path Traversal

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	5.9 MEDIUM	NETWORK	HIGH	LOW	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

Base Score

CVSS 3.x

EPSS Score

Percentile: 25%

Affected Products (NVD)

Vendor	Product	Version
amazon	tough	0.9.0 ≤ 𝑥 < 0.22.0
amazon	tuftool	𝑥 < 0.15.0

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References

https://aws.amazon.com/security/security-bulletins/2026-019-aws/

https://crates.io/crates/tough/0.22.0

https://crates.io/crates/tuftool/0.15.0

https://github.com/awslabs/tough/releases/tag/tough-v0.22.0

https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0

https://github.com/awslabs/tough/security/advisories/GHSA-v57p-gppj-p9vg