{"cve":"CVE-2026-71417","nvd":{"published":"2026-08-18T20:17:24.237","modified":"2026-10-22T22:10:00.250","status":"Deferred","description":"Lemur manages TLS certificate creation. Prior to 1.9.3, POST /api/1/certificates/upload allowed a non-read-only user to create a duplicate row using another certificate body, authority_id, serial, or external_id without requiring permission on the underlying authority. PUT /api/1/certificates//revoke authorized the caller against only the selected Lemur row, so the creator of the duplicate bypassed CertificatePermission. The duplicate had no cert.endpoints, which also bypassed the safeguard that prevents revocation of deployed certificates. Issuer plugins then revoked the real CA-side certificate using certificate.body or external_id under the stored authority credentials. An attacker could therefore revoke arbitrary managed certificates and cause fleet-wide TLS denial of service. The fix rejects duplicate authority_id and serial identities, requires authority access on upload, and checks every matching row during revocation. This issue is fixed in version 1.9.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","score":7.3},"cwes":["CWE-639"],"references":["https://github.com/Netflix/lemur/commit/851389ae737a6d6bf16c1f9ca64a2ce56c1cc5c6","https://github.com/Netflix/lemur/releases/tag/v1.9.3","https://github.com/Netflix/lemur/security/advisories/GHSA-pxmc-2ffp-8j67","https://github.com/Netflix/lemur/security/advisories/GHSA-pxmc-2ffp-8j67"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-71417","score":0.00105,"percentile":0.01041,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-pxmc-2ffp-8j67","url":"https://osv.dev/vulnerability/GHSA-pxmc-2ffp-8j67","summary":"Lemur: Any user can revoke arbitrary certificates at the CA by uploading a duplicate record and revoking it","modified":"2026-08-19T12:55:45.610007425Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.3"],"fixed":["1.9.3"]}]},{"id":"PYSEC-2026-3678","url":"https://osv.dev/vulnerability/PYSEC-2026-3678","summary":"Lemur: Any user can revoke arbitrary certificates at the CA by uploading a duplicate record and revoking it","modified":"2026-08-19T12:45:11.280895991Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.3"],"fixed":["1.9.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}