Ghostwire

CVE-2026-6966: Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before...

MEDIUM CVSS 5.3 1 PoC

Published: April 24, 2026 | Last Modified: April 24, 2026

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.

Ghostwire Analysis — What This Means Practically

Medium CVSS score indicates moderate risk — exploitation requires specific conditions or results in limited impact.
1 proof-of-concept exploit available on GitHub. Public exploit code lowers the barrier for both researchers and attackers.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

Proof-of-Concept Exploits (1)

awslabs/tough

CVE-2026-6966: Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before...

Description

Ghostwire Analysis — What This Means Practically

Proof-of-Concept Exploits (1)

Security Coverage (1 articles)

References