SSL errors occur for TLS certificates issued on December 1

Incident Report for GMO GlobalSign

Resolved

The issue affecting TLS certificates issued on or after December 1 has been resolved. All affected CT logs have been removed from our configuration, and reissuing certificates restores trust in all major browsers. If you have not yet reissued your certificate, please do so to ensure proper functionality. Services are operating normally.

Posted Dec 01, 2025 - 13:12 UTC

Identified

We are aware of an issue affecting TLS certificates issued on 1st December which can cause them to not be trusted by some browsers. This is caused by the trust status of some of the 2027 CT Logs. We are urgently removing affected logs from our configuration. Re-issuing affected certificates will resolve the problem.

Posted Dec 01, 2025 - 10:33 UTC

This incident affected: GCC (Certificate Issuance) and Atlas (Certificate Issuance).