{"id":"CVE-2026-6967","sourceIdentifier":"ff89ba41-3aa1-4d27-914a-91399e9639e5","published":"2026-04-24T20:16:29.020","lastModified":"2026-10-26T21:10:00.170","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"Falta de aplicación de la caducidad, el hash y la longitud en la validación de metadatos delegados en awslabs/tough anterior a tough-v0.22.0 permite a usuarios remotos autenticados con autoridad de firma delegada eludir las comprobaciones de integridad de la especificación TUF para los metadatos de objetivos delegados y envenenar la caché de metadatos local, porque load_delegations no aplica las mismas comprobaciones de validación que la ruta de metadatos de objetivos de nivel superior.\n\nRecomendamos actualizar a tough-v0.22.0 / tuftool-v0.15.0."}],"affected":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","affectedData":[{"vendor":"AWS","product":"tough","defaultStatus":"unaffected","versions":[{"version":"0.9.0","lessThanOrEqual":"0.21","versionType":"custom","status":"affected"}]},{"vendor":"AWS","product":"tuftool","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"0.14","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/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","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":1.6,"impactScore":4.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-24T20:13:04.619106Z","id":"CVE-2026-6967","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","description":[{"lang":"en","value":"CWE-345"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*","versionStartIncluding":"0.9.0","versionEndExcluding":"0.22.0","matchCriteriaId":"51AC1B2A-ACBA-4ABE-9A31-1132436EEF0F"},{"vulnerable":true,"criteria":"cpe:2.3:a:amazon:tuftool:*:*:*:*:*:rust:*:*","versionEndExcluding":"0.15.0","matchCriteriaId":"E83215AA-4B4B-44C1-A062-B7212CF33EF5"}]}]}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-019-aws/","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Vendor Advisory"]},{"url":"https://crates.io/crates/tough/0.22.0","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Product"]},{"url":"https://crates.io/crates/tuftool/0.15.0","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Product"]},{"url":"https://github.com/awslabs/tough/releases/tag/tough-v0.22.0","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Release Notes"]},{"url":"https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Release Notes"]},{"url":"https://github.com/awslabs/tough/security/advisories/GHSA-4v58-8p28-2rq3","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","tags":["Vendor Advisory"]}]}