CVE-2026-48508

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{"affected": [{"affectedData": [{"product": "lemur", "vendor": "Netflix", "versions": [{"status": "affected", "version": "< 1.9.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Lemur manages TLS certificate creation. Prior to 1.9.1, StrictRolePermission and AuthorityCreatorPermission in lemur/auth/permissions.py call flask_principal.Permission.__init__() with zero Need objects when ADMIN_ONLY_AUTHORITY_CREATION and LEMUR_STRICT_ROLE_ENFORCEMENT are unset because both flags default to False. Flask-Principal Permission.allows() returns True when self.needs is empty, so the .can() authorization gate permits every authenticated identity, including the read-only role. A read-only user can access POST /api/1/authorities, POST /api/1/certificates/upload, POST /api/1/pending_certificates//upload, POST /api/1/notifications, PUT or DELETE /api/1/notifications/, and POST /api/1/domains to create root Certificate Authorities, upload arbitrary certificates, create or edit notifications that reach an SSRF sink, and create domain entries. Explicitly setting either flag to False continues to opt into the permissive behavior. This issue is fixed in version 1.9.1."}, {"lang": "es", "value": "Lemur gestiona la creaci\u00f3n de certificados TLS. Antes de la 1.9.1, StrictRolePermission y AuthorityCreatorPermission en lemur/auth/permissions.py llaman a flask_principal.Permission.__init__() con cero objetos Need cuando ADMIN_ONLY_AUTHORITY_CREATION y LEMUR_STRICT_ROLE_ENFORCEMENT no est\u00e1n configuradas porque ambas banderas por defecto son False. Flask-Principal Permission.allows() devuelve True cuando self.needs est\u00e1 vac\u00edo, por lo que la puerta de autorizaci\u00f3n .can() permite a cada identidad autenticada, incluido el rol de solo lectura. Un usuario de solo lectura puede acceder a POST /api/1/authorities, POST /api/1/certificates/upload, POST /api/1/pending_certificates//upload, POST /api/1/notifications, PUT o DELETE /api/1/notifications/, y POST /api/1/domains para crear Autoridades de Certificaci\u00f3n ra\u00edz, subir certificados arbitrarios, crear o editar notificaciones que alcanzan un sumidero SSRF, y crear entradas de dominio. Establecer expl\u00edcitamente cualquiera de las banderas en False contin\u00faa optando por el comportamiento permisivo. Este problema est\u00e1 solucionado en la versi\u00f3n 1.9.1."}], "id": "CVE-2026-48508", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48508", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T19:31:14.964206Z", "version": "2.0.3"}}]}, "published": "2026-08-18T18:17:41.073", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/commit/e6a41e2c1b2028840d19039b06895524a19ad36f"}, {"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/releases/tag/v1.9.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-qcqw-jwxc-2hqg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.9.1)"}}], "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": "2026-08-18T19:30:04.071088+00:00", "updated": "2026-08-18T20:00:04.734752+00:00", "vendors": ["netflix", "netflix$PRODUCT$lemur"]}