CVE-2026-71308

{
  "id": "CVE-2026-71308",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T20:17:23.740",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Deferred",
  "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 creación de certificados TLS. Desde la versión 0.5.0 hasta la 1.9.3, las solicitudes de creación, carga y edición de certificados aceptaban identificadores de replaces[] o replacements que AssociatedCertificateSchema resolvía con fetch_objects sin una verificación de CertificatePermission. Asignar esos objetos a Certificate.replaces invocaba un append listener que deshabilitaba las notificaciones del certificado víctima y lo marcaba como reemplazado. La víctima era entonces excluida de get_all_pending_reissue, y certificate_rotate podía desplegar el certificado del atacante a los puntos finales que servían a la víctima. Un usuario autenticado no de solo lectura podía atacar certificados sobre los cuales el usuario no tenía propiedad o rol, suprimir la automatización del ciclo de vida y causar una interrupción de TLS en toda la flota o una sustitución no autorizada. La solución autoriza cada certificado de reemplazo referenciado antes de la mutación. Este problema está solucionado en la versión 1.9.3."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Netflix",
          "product": "lemur",
          "versions": [
            {
              "version": ">= 0.5.0, < 1.9.3",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T19:34:39.582542Z",
          "id": "CVE-2026-71308",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Netflix/lemur/releases/tag/v1.9.3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}