CVE-2026-6966: awslabs/tough Delegated Roles have a Signature Threshold Bypass
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.
References
- aws.amazon.com/security/security-bulletins/2026-019-aws
- crates.io/crates/tough/0.22.0
- crates.io/crates/tuftool/0.15.0
- github.com/advisories/GHSA-8m7c-8m39-rv4x
- github.com/awslabs/tough/releases/tag/tough-v0.22.0
- github.com/awslabs/tough/releases/tag/tuftool-v0.15.0
- github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4x
- nvd.nist.gov/vuln/detail/CVE-2026-6966
Code Behaviors & Features
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