CVE-2026-6966

5.3 MEDIUM
Published: April 24, 2026 Modified: April 27, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://aws.amazon.com/security/security-bulletins/2026-019-aws/
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://crates.io/crates/tough/0.22.0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://crates.io/crates/tuftool/0.15.0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/awslabs/tough/releases/tag/tough-v0.22.0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
4th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)