Issue Summary:
On April 9th, 2026, a planned production deployment to CyberGrants introduced a code defect that caused Single Sign-On (SSO) to return errors for some users. Affected users were unable to log in via SSO during the disruption window. A rollback was initiated to restore normal service.
Root Cause:
An edge case was identified in the SSO handler where a required dependency did not load correctly in the production environment following the deployment. This caused SSO authentication requests to fail for a subset of users. The defect was not surfaced during pre-production testing due to the environmental conditions required to trigger the edge case.
Prevention:
We rolled back the deployment to restore SSO functionality for all affected users. We are currently reviewing and thoroughly testing the SSO handler in non-production environments to identify and resolve the edge case before re-deploying. Additional testing coverage will be introduced to better simulate production conditions and prevent recurrence.