CVE-2026-6967
Published:April 24, 2026
Updated:May 18, 2026
Missing expiration, hash, and length enforcement in delegated metadata validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users with delegated signing authority to bypass TUF specification integrity checks for delegated targets metadata and poison the local metadata cache, because load_delegations does not apply the same validation checks as the top-level targets metadata path.
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 0.15.0tuftool (RUST):
Affected version(s) >=0.1.0 <0.15.0Fix Suggestion:
Update to version 0.15.0tough (RUST):
Affected version(s) >=0.9.0 <0.22.0Fix Suggestion:
Update to version 0.22.0Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
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
LOW
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
Insufficient Verification of Data Authenticity
EPSS
Base Score:
0.02