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CVE-2026-6966

Signature Threshold Bypass in awslabs/tough Delegated Roles

CVSS 7 HIGHEPSS 0.3%CWE-347
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.
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Produtos afetados
AWS · toughAWS · tuftool

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Referências
https://aws.amazon.com/security/security-bulletins/2026-019-aws/https://crates.io/crates/tough/0.22.0https://crates.io/crates/tuftool/0.15.0https://github.com/awslabs/tough/releases/tag/tough-v0.22.0https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0https://github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4x