{"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"}}]}}

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