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OCI Chicago – APEX Builder and Database Actions Login Fail with HTTP 500 / SSO Token Exchange Error

in Autonomous Database

Summary:

Two independent Always Free Autonomous Databases in OCI Chicago (us-chicago-1) began experiencing authentication failures on November 12, 2026. Both APEX Builder and Database Actions fail immediately after login, while deployed APEX applications continue operating normally. The ORDS SSO callback returns HTTP 500 with the error "Failed to exchange auth code for tokens." The issue reproduces across multiple browsers, devices, and networks.

Content (please ensure you mask any confidential information):

Issue Description

I have two separate Oracle Autonomous Databases running in the Chicago region (us-chicago-1), both within the same OCI compartment and Always Free tenancy.

Beginning November 12, 2026, I have been unable to access APEX Builder/Workspace or Database Actions on either database.

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