{"cve":"CVE-2026-71308","nvd":{"published":"2026-08-18T20:17:23.740","modified":"2026-10-22T22:10:00.250","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1},"cwes":["CWE-639","CWE-862"],"references":["https://github.com/Netflix/lemur/commit/286874535160952143b0afe2d356642669f9d4c6","https://github.com/Netflix/lemur/releases/tag/v1.9.3","https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv","https://github.com/Netflix/lemur/security/advisories/GHSA-cfh6-pv5c-38jv"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-71308","score":0.00317,"percentile":0.24388,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-cfh6-pv5c-38jv","url":"https://osv.dev/vulnerability/GHSA-cfh6-pv5c-38jv","summary":"Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates","modified":"2026-08-19T12:55:54.108394687Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":[">=0.5.0 <1.9.3"],"fixed":["1.9.3"]}]},{"id":"PYSEC-2026-3675","url":"https://osv.dev/vulnerability/PYSEC-2026-3675","summary":"Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates","modified":"2026-08-19T12:45:11.230354189Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":[">=0.5.0 <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."]}