CVE-2026-6967CWE-345

CVE-2026-6967

Medium · published April 25, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
15.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00253 · 15.8th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-04-25T00:16Z
Affected products (2)
ProductVersionsFixed in
amazon/tough≥ 0.9.0, < 0.22.00.22.0
amazon/tuftool< 0.15.00.15.0
References (6)
https://aws.amazon.com/security/security-bulletins/2026-019-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://crates.io/crates/tough/0.22.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://crates.io/crates/tuftool/0.15.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/awslabs/tough/releases/tag/tough-v0.22.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 24 APR 19:41Z
    Missing Delegated Metadata Validation in awslabs/tough
    cvelistv5