{"id":"CVE-2026-71308","summary":"Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates","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.","aliases":["GHSA-cfh6-pv5c-38jv","PYSEC-2026-3675"],"modified":"2026-09-10T03:30:21.029162742Z","published":"2026-08-18T19:00:40.503Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/netflix/lemur","events":[{"introduced":"479ac81aa9500c70ee50e6dc30d90d26130454bb"},{"fixed":"286874535160952143b0afe2d356642669f9d4c6"},{"fixed":"726506d15a6da8d9bcf5c39b4dc0c95535cf03c0"}],"database_specific":{"extracted_events":[{"introduced":"0.5.0"},{"fixed":"1.9.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.9.2","v1.9.1","v1.9.0","v1.8.2","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.11.0","v0.10.0","v0.9.0","v0.8.1","0.8.0","0.7.0","0.6.0","0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71308.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"}]}