What is CVE-2026-6967?

CVE-2026-6967 is a medium-severity vulnerability in Amazon Tough, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.9/10. Published 2026-04-24.

How severe is CVE-2026-6967?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Amazon Tough

CVE-2026-6967

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 del…

EPSS: 0.000 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L.

Affected products

Amazon Tough
Amazon Tuftool
Aws Tough — versions 0.22.0
Aws Tuftool — versions 0.15.0

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory, Vendor Advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Product, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Product, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Vendor Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-6967?: CVE-2026-6967 is a medium-severity vulnerability in Amazon Tough, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.9/10. Published 2026-04-24.
How severe is CVE-2026-6967?: Medium severity. CVSS v3 base score is 5.9 out of 10.