{"cve":"CVE-2026-6967","nvd":{"published":"2026-04-24T20:16:29.020","modified":"2026-10-20T19:17:51.800","status":"Modified","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.\n\n\n\nWe recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.","cvss_v4":{"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","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-345"],"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"],"products":["amazon:tough","amazon:tuftool"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-6967","score":0.00253,"percentile":0.16588,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-4v58-8p28-2rq3","url":"https://osv.dev/vulnerability/GHSA-4v58-8p28-2rq3","summary":"awslabs/tough is Missing Delegated Metadata Validation","modified":"2026-09-10T03:51:04.664676439Z","packages":[{"ecosystem":"crates.io","name":"tough","purl":"pkg:cargo/tough","ranges":[">=0.9.0 <0.22.0"],"fixed":["0.22.0"]},{"ecosystem":"crates.io","name":"tuftool","purl":"pkg:cargo/tuftool","ranges":["<0.15.0"],"fixed":["0.15.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}