CVE-2026-71308

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{"affected": [{"affectedData": [{"product": "lemur", "vendor": "Netflix", "versions": [{"status": "affected", "version": ">= 0.5.0, < 1.9.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Lemur manages TLS certificate creation. From 0.5.0 until 1.9.3, certificate create, upload, and edit requests accepted replaces[] or replacements identifiers that AssociatedCertificateSchema resolved with fetch_objects without a CertificatePermission check. Assigning those objects to Certificate.replaces invoked an append listener that disabled the victim certificate notifications and marked it as replaced. The victim was then excluded from get_all_pending_reissue, and certificate_rotate could deploy the attacker certificate to endpoints serving the victim. An authenticated non-read-only user could target certificates for which the user had no ownership or role, suppress lifecycle automation, and cause fleet-wide TLS disruption or unauthorized substitution. The fix authorizes every referenced replacement certificate before mutation. This issue is fixed in version 1.9.3."}, {"lang": "es", "value": "Lemur gestiona la creaci\u00f3n de certificados TLS. Desde la versi\u00f3n 0.5.0 hasta la 1.9.3, las solicitudes de creaci\u00f3n, carga y edici\u00f3n de certificados aceptaban identificadores de replaces[] o replacements que AssociatedCertificateSchema resolv\u00eda con fetch_objects sin una verificaci\u00f3n de CertificatePermission. Asignar esos objetos a Certificate.replaces invocaba un append listener que deshabilitaba las notificaciones del certificado v\u00edctima y lo marcaba como reemplazado. La v\u00edctima era entonces excluida de get_all_pending_reissue, y certificate_rotate pod\u00eda desplegar el certificado del atacante a los puntos finales que serv\u00edan a la v\u00edctima. Un usuario autenticado no de solo lectura pod\u00eda atacar certificados sobre los cuales el usuario no ten\u00eda propiedad o rol, suprimir la automatizaci\u00f3n del ciclo de vida y causar una interrupci\u00f3n de TLS en toda la flota o una sustituci\u00f3n no autorizada. La soluci\u00f3n autoriza cada certificado de reemplazo referenciado antes de la mutaci\u00f3n. Este problema est\u00e1 solucionado en la versi\u00f3n 1.9.3."}], "id": "CVE-2026-71308", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-71308", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T19:34:39.582542Z", "version": "2.0.3"}}]}, "published": "2026-08-18T20:17:23.740", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6"}, {"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/releases/tag/v1.9.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.5.0,1.9.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "lemur", "source": "cna", "vendor": "Netflix"}, "product": "lemur", "vendor": "netflix"}], "created": "2026-08-18T20:30:17.072803+00:00", "updated": "2026-08-18T20:45:04.516244+00:00", "vendors": ["netflix", "netflix$PRODUCT$lemur"]}