CVE-2026-70666

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{"affected": [{"affectedData": [{"product": "lemur", "vendor": "Netflix", "versions": [{"status": "affected", "version": "< 1.9.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Lemur manages TLS certificate creation. Prior to 1.9.3, an authority-role member could update acme_url through PUT /api/1/authorities/ without revalidation and direct setup_acme_client_no_retry to an attacker-controlled ACME server. ACME directory and order responses contain newNonce, newOrder, authorizations, and finalize URLs chosen by that server. The Lemur ClientV2 followed those URLs without requiring their host to match the configured directory host, allowing JWS-signed requests to internal services or cloud metadata endpoints. The issue required an ACME authority and a user authorized for that authority, but did not require global administrator privileges. The fix revalidates updates and introduces _PinnedClientNetwork to enforce a single allowed host for the complete ACME flow. This issue is fixed in version 1.9.3."}, {"lang": "es", "value": "Lemur gestiona la creaci\u00f3n de certificados TLS. Antes de la versi\u00f3n 1.9.3, un miembro con rol de autoridad pod\u00eda actualizar acme_url a trav\u00e9s de PUT /api/1/authorities/ sin revalidaci\u00f3n y dirigir setup_acme_client_no_retry a un servidor ACME controlado por un atacante. Las respuestas de directorio y orden de ACME contienen las URL newNonce, newOrder, authorizations y finalize elegidas por ese servidor. El ClienteV2 de Lemur segu\u00eda esas URL sin requerir que su host coincidiera con el host de directorio configurado, permitiendo solicitudes firmadas con JWS a servicios internos o puntos finales de metadatos en la nube. El problema requer\u00eda una autoridad ACME y un usuario autorizado para esa autoridad, pero no requer\u00eda privilegios de administrador global. La soluci\u00f3n revalida las actualizaciones e introduce _PinnedClientNetwork para forzar un \u00fanico host permitido para el flujo ACME completo. Este problema est\u00e1 solucionado en la versi\u00f3n 1.9.3."}], "id": "CVE-2026-70666", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 3.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-70666", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T18:04:02.112548Z", "version": "2.0.3"}}]}, "published": "2026-08-18T20:17:23.237", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/commit/6dcb19b6d6004e97796d6a0344b130b2ba57f050"}, {"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-xpmj-wjcp-6pww"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[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": "2026-08-18T20:45:04.333388+00:00", "updated": "2026-08-18T21:00:04.570616+00:00", "vendors": ["netflix", "netflix$PRODUCT$lemur"]}