{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71308","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-05T18:14:42.063Z","datePublished":"2026-08-18T19:00:40.503Z","dateUpdated":"2026-08-18T19:34:59.015Z"},"containers":{"cna":{"title":"Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"},{"name":"https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6","tags":["x_refsource_MISC"],"url":"https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6"},{"name":"https://github.com/Netflix/lemur/releases/tag/v1.9.3","tags":["x_refsource_MISC"],"url":"https://github.com/Netflix/lemur/releases/tag/v1.9.3"}],"affected":[{"vendor":"Netflix","product":"lemur","versions":[{"version":">= 0.5.0, < 1.9.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-18T19:00:40.503Z"},"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."}],"source":{"advisory":"GHSA-cfh6-pv5c-38jv","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T19:34:39.582542Z","id":"CVE-2026-71308","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-18T19:34:59.015Z"}}]}}