Supabase incident: Sign-in failures for `signInWithIdToken` (OIDC) logins on free-tier projects

1. resolvedAug 19, 2026, 15:56 UTC

   We have confirmed that the fix has been effective and are marking this incident as resolved.

2. monitoringAug 19, 2026, 13:01 UTC

   We've identified that starting 4pm UTC on August 18th we began seeing sign-in failures with signInWithIdToken (OIDC) logins on free-tier projects. Users authenticating with OIDC providers other than Google/Apple/Firebase may have seen failed login attempts. We've identified the root cause and fix has been rolled out. We are monitoring for continued stability.

3. monitoringAug 19, 2026, 12:48 UTC

   We've identified that starting 4pm UTC on August 18th we began seeing sign-in failures with signInWithIdToken (OIDC) logins on free-tier projects.  Users authenticating with OIDC providers other than Google/Apple/Firebase may have seen failed login attempts. We've identified the root cause and fix has been rolled out.

4. monitoringAug 19, 2026, 12:47 UTC

   We've identified an issue causing sign-in failures for `signInWithIdToken` (OIDC) logins on free-tier projects. Users authenticating with non-Google/Apple/Firebase OIDC providers may see failed login attempts. We've identified the root cause and fix has been rolled out. Impacted timeframe was 18th August 4pm UTC - 19th Aug 10:30am UTC

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Supabase's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

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How often does Supabase have incidents?

Supabase reported 43 incidents in the last 90 days, 16 of them major or critical. A typical incident lasted 2h 2m. See Supabase's uptime and incident history