{"id":"CVE-2026-71308","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-71308","summary":"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…","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.","published":"2026-08-18T20:17:23.740","modified":"2026-08-18T20:17:23.740","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6","label":"Netflix/lemur@2868745"},"references":[{"type":"WEB","url":"https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6"},{"type":"WEB","url":"https://github.com/Netflix/lemur/releases/tag/v1.9.3"},{"type":"WEB","url":"https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"},{"type":"WEB","url":"https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T20:17:23.740"}}