CVE-2026-6967: falha de alta gravidade em AWS tough
Missing Delegated Metadata Validation in awslabs/tough
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.1epss 0.3%
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
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CVE-2026-6968HIGHMultiple Path Traversal Variants in awslabs/toughEPSS 0.5%CVE-2025-2888MEDIUMImproper timestamp caching during snapshot rollback in toughEPSS 0.3%CVE-2025-2887MEDIUMFailure to detect delegated target rollback in toughEPSS 0.3%CVE-2025-2886MEDIUMTerminating targets role delegations are not respected in toughEPSS 0.3%CVE-2025-2885MEDIUMRoot metadata version not validated in toughEPSS 0.3%CVE-2026-6966HIGHSignature Threshold Bypass in awslabs/tough Delegated RolesEPSS 0.3%
Referências
https://aws.amazon.com/security/security-bulletins/2026-019-aws/https://crates.io/crates/tough/0.22.0https://crates.io/crates/tuftool/0.15.0https://github.com/awslabs/tough/releases/tag/tough-v0.22.0https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3