CVE-2026-71308

Netflix Lemur versions 0.5.0 through 1.9.2 accept unauthenticated replaces[] identifiers, allowing an authenticated non-read-only user to silence victim certificate notifications, exclude them from reissue rotation, and substitute attacker-controlled certificates at scale. CVSS 8.1 (HIGH). Fixed ...

CVE-2026-71308 Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates

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 fetchobjects without a CertificatePermission check. Assigning those objects to...

Mozilla: Fullscreen notification bypass

The Mozilla Foundation Security Advisory describes this flaw as: By confusing the browser, the fullscreen notification could have been delayed or suppressed, resulting in potential user confusion or spoofing attacks...