minor✓ Resolved

Firebase Hosting returning unexpected 431 errors on some POST requests to Firebase Functions rewrites

Firebase•2026-01-06 17:34 UTC

Status

resolved

Duration

2h 56m

Updates

Coverage

0 articles

INCIDENT TIMELINE

✓ Resolved2026-01-06 20:30 UTC

This incident has been resolved.

resolved2026-01-06 19:29 UTC

The Firebase Hosting team is currently rolling out a fix. It should be available globally within a few hours.

investigating2026-01-06 17:34 UTC

POST requests against Firebase Hosting Sites with rewrites to Firebase Fuctions can occasionally return unexpected 431 errors.

Internal ID

efbd89df-a7ef-40c2-91a3-9d1ea1ec84df

External ID

51YhJchdiN3Mc1542MkD

🕐 Started

2025-12-20 17:00 UTC

🔄 Last Updated

2026-01-07 00:22 UTC

✓ Resolved

2026-01-06 20:30 UTC

MINOR

Impact Level

2h 56m

Total Duration

Status Updates

Affected Components

Hosting

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