CVE-2026-6967

EUVD-2026-25628

24.04.2026, 20:16

Missing expiration, hash, and length enforcement in delegated metadata validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users with delegated signing authority to bypass TUF specification integrity checks for delegated targets metadata and poison the local metadata cache, because load_delegations does not apply the same validation checks as the top-level targets metadata path.

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

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: 7%

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-345 - Insufficient Verification of Data Authenticity
The software does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

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-4v58-8p28-2rq3