CVE-2026-6967: Amazon Tough

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Amazon Tough: from 0.9.0, before 0.22.0 (fixed in 0.22.0)
• Amazon Tuftool: before 0.15.0 (fixed in 0.15.0)

Published 2026-04-24. Last modified 2026-06-17.