CVE-2026-6967

high

Description

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.

References

https://aws.amazon.com/security/security-bulletins/2026-019-aws/

https://aws.amazon.com/security/security-bulletins/rss/2026-019-aws/

https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3

https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0

https://github.com/awslabs/tough/releases/tag/tough-v0.22.0

https://crates.io/crates/tuftool/0.15.0

https://crates.io/crates/tough/0.22.0

Details

Source: Mitre, NVD

Published: 2026-04-24

Updated: 2026-05-06

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:L

Severity: High

EPSS

EPSS: 0.00024