{"id":"CVE-2026-6966","revision":"608a62c0538d44dfaaf1e247d596a9e8","records":[{"revision":"608a62c0538d44dfaaf1e247d596a9e8","observedAt":"2026-10-25T15:18:57.446+00:00","statement":{"source":"nvd","id":"CVE-2026-6966","aliases":[],"title":"Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users to bypass the TUF signature threshold requirement by duplicating a valid signat…","description":"Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users to bypass the TUF signature threshold requirement by duplicating a valid signature, causing the client to accept forged delegated role metadata.\n\n\n\nWe recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.","state":0,"publishedAt":"2026-04-24T20:16:28.883+00:00","modifiedAt":"2026-10-20T19:17:51.617+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5 · Secondary","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:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7,"severity":"HIGH"},{"system":"CVSS 3.1 · ff89ba41-3aa1-4d27-914a-91399e9639e5 · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":6.5,"severity":"MEDIUM"}],"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-8m7c-8m39-rv4x"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6966","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-347"],"productCriteria":["cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*","cpe:2.3:a:amazon:tuftool:*:*:*:*:*:rust:*:*"],"sourceDates":{"published":"2026-04-24T20:16:28.883","lastModified":"2026-10-20T19:17:51.617"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-6966","identifiers":["CVE-2026-6966"]},"retained":false,"historicalAffected":[]}],"coverage":[]}