CVE-2026-6966
Published:April 24, 2026
Updated:May 18, 2026
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.
Affected Packages
tough (RUST):
Affected version(s) >=0.0.0 <0.22.0Fix Suggestion:
Update to version 0.22.0tuftool (RUST):
Affected version(s) >=0.1.0 <0.15.0Fix Suggestion:
Update to version 0.15.0tough (RUST):
Affected version(s) >=0.0.0 <0.22.0Fix Suggestion:
Update to version 0.22.0tuftool (RUST):
Affected version(s) >=0.1.0 <0.15.0Fix Suggestion:
Update to version 0.15.0Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
7
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Verification of Cryptographic Signature
EPSS
Base Score:
0.02