{"id":"CVE-2026-41323","sourceIdentifier":"security-advisories@github.com","published":"2026-04-24T04:16:20.593","lastModified":"2026-11-11T23:10:00.263","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue."},{"lang":"es","value":"Kyverno es un motor de políticas diseñado para equipos de ingeniería de plataformas nativas de la nube. Antes de las versiones 1.18.0-rc1, 1.17.2-rc1 y 1.16.4, la característica apiCall de Kyverno en ClusterPolicy adjunta automáticamente el token de ServiceAccount del controlador de admisión a las solicitudes HTTP salientes. La URL del servicio no tiene validación - puede apuntar a cualquier lugar, incluyendo servidores controlados por el atacante. Dado que el SA del controlador de admisión tiene permisos para parchear configuraciones de webhook, un token robado conduce a un compromiso total del clúster. Las versiones 1.18.0-rc1, 1.17.2-rc1 y 1.16.4 parchean el problema."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"kyverno","product":"kyverno","versions":[{"version":"< 1.16.4","status":"affected"},{"version":">= 1.17.0-rc1, < 1.17.2-rc1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.3,"impactScore":6.0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-24T12:04:48.048182Z","id":"CVE-2026-41323","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-200"},{"lang":"en","value":"CWE-918"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kyverno:kyverno:*:-:*:*:*:*:*:*","versionEndExcluding":"1.16.4","matchCriteriaId":"D99E721C-8123-4DD3-843C-41F652B954D4"},{"vulnerable":true,"criteria":"cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*","versionStartIncluding":"1.17.0","versionEndExcluding":"1.17.2","matchCriteriaId":"69DC2B53-AFC4-4710-B8BC-DCCF46C5CE01"}]}]}],"references":[{"url":"https://github.com/kyverno/kyverno/commit/bc4f91c4801b1eaa2edc0a14e2f1b0af8cf0c1f5","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/kyverno/kyverno/commit/c2eab00033e635bda4e4efb58c1b472b41728bb6","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/kyverno/kyverno/commit/f70e8ac1e7acd2e3844f9553e4a884f07f953de0","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}