CVE-2026-6966

Description

Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users to bypass the TUF signature threshold requirement by duplicating a valid signature, causing the client to accept forged delegated role metadata. We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.

Affected Platforms

Weakness Type

CWE-347

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-8m7c-8m39-rv4x