CVE-2026-6966

Signature Threshold Bypass in awslabs/tough Delegated Roles

CVSS 7 HIGHEPSS 0.3%CWE-347

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 7EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Ciclo de vida

24 abr 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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

Productos afectados

AWS · tough AWS · tuftool

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Referencias

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