{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71303", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-05T18:14:42.063Z", "datePublished": "2026-08-18T19:03:55.524Z", "dateUpdated": "2026-08-18T19:46:07.340Z"}, "containers": {"cna": {"title": "Lemur: Incomplete fix for CVE-2026-55166 -- ACME authority update endpoint allows non-admin to replace `acme_url` with internal IP, bypassing allowlist", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/Netflix/lemur/security/advisories/GHSA-v5rc-cpwc-cfpr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Netflix/lemur/security/advisories/GHSA-v5rc-cpwc-cfpr"}, {"name": "https://github.com/Netflix/lemur/commit/edca0390f930344d65ff4ca37a669c2320e3dfad", "tags": ["x_refsource_MISC"], "url": "https://github.com/Netflix/lemur/commit/edca0390f930344d65ff4ca37a669c2320e3dfad"}, {"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": "< 1.9.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-18T19:03:55.524Z"}, "descriptions": [{"lang": "en", "value": "Lemur manages TLS certificate creation. Prior to 1.9.3, _validate_acme_url enforced ACME_DIRECTORY_HOST_ALLOWLIST when an authority was created, but PUT /api/1/authorities/ passed options to lemur/authorities/service.py without applying the same check. A user holding an authority role could replace the stored acme_url with an internal service or instance-metadata URL such as 169.254.169.254. The next issuance operation loaded that value and passed it to ClientV2.get_directory, causing an outbound request from the Lemur backend. This bypassed the creation-time mitigation for CVE-2026-55166 and could expose internal services or cloud metadata. The fix revalidates acme_url whenever authority options are updated. This issue is fixed in version 1.9.3."}], "source": {"advisory": "GHSA-v5rc-cpwc-cfpr", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/Netflix/lemur/security/advisories/GHSA-v5rc-cpwc-cfpr", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-18T19:45:59.586663Z", "id": "CVE-2026-71303", "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": "2026-08-18T19:46:07.340Z"}}]}}

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