Google Analytics for Firebase iOS SDK outage on September 28, 2026

On September 28, 2026, a routine cleanup of a legacy remote configuration flag caused iOS apps using the Google Analytics for Firebase SDK to crash when launching after receiving a malformed configuration payload. The issue resulted from removing a flag without removing an SDK pointer to it, leading to a fatal error; affected apps generally crashed once before reverting to a previously cached configuration, with no permanent crash loops observed. The invalid configuration was served globally for 2 hours and 11 minutes, beginning at 17:41 PDT, with engineers alerted within about 20 minutes and completing a global rollback at 19:52, although delayed crash-report uploads prolonged visible error rates. Google acknowledged that its server-focused status dashboards did not detect the client-side crashes and relied on GitHub and later console and dashboard updates to communicate with developers. Planned safeguards include stricter SDK validation of incoming configurations, audits of Firebase SDK parsing behavior, automated checks for broken configuration dependencies, improved phased rollouts and monitoring, and faster, more comprehensive status-dashboard reporting.

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