CVE-2026-6966

MEDIUM

Signature Threshold Bypass in awslabs/tough Delegated Roles

Title source: cna
STIX 2.1

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.

References (6)

Scores

CVSS v3 5.3
EPSS 0.0002
EPSS Percentile 4.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-347
Status published
Products (2)
AWS/tough 0.22.0
AWS/tuftool 0.15.0
Published Apr 24, 2026
Tracked Since Apr 24, 2026