CVE-2026-6967highCWE-345

Missing Delegated Metadata Validation in awslabs/tough

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.2%

exploitation probability

0.2%top 84% of all CVEs

observed exploitation

nono source reports it

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.

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

Affected products

AWS · tough AWS · tuftool

References

https://aws.amazon.com/security/security-bulletins/2026-019-aws/https://crates.io/crates/tough/0.22.0 https://crates.io/crates/tuftool/0.15.0 https://github.com/awslabs/tough/releases/tag/tough-v0.22.0 https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0 https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3