PYSEC-2026-3678 Lemur: Any user can revoke arbitrary certificates at the CA by uploading a duplicate record and revoking it

Summary Repo under test: https://github.com/Netflix/lemur PUT /api/1/certificates//revoke authorizes the caller against the Lemur database row creator == current user, or CertificatePermission over the row's roles rather than the underlying CA-side certificate identity. Separately, POST...

CVE-2026-71417

In Lemur before 1.9.3, a non-read-only user could upload a duplicate certificate row bypassing CertificatePermission, then revoke it via PUT /api/1/certificates//revoke, causing issuer plugins to revoke the real CA-side certificate and causing fleet-wide TLS denial of service. Fixed in 1.9.3. No ...