{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.5.0"
              },
              {
                "fixed": "1.9.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "479ac81aa9500c70ee50e6dc30d90d26130454bb"
            },
            {
              "fixed": "286874535160952143b0afe2d356642669f9d4c6"
            },
            {
              "fixed": "726506d15a6da8d9bcf5c39b4dc0c95535cf03c0"
            }
          ],
          "repo": "https://github.com/netflix/lemur",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-cfh6-pv5c-38jv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-639",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71308.json"
  },
  "details": "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.",
  "id": "CVE-2026-71308",
  "modified": "2026-09-10T03:30:21.029162742Z",
  "published": "2026-08-18T19:00:40.503Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Netflix/lemur/releases/tag/v1.9.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71308.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71308"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates"
}