Cloudflare

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Browser isolation session data sync issues

Updated 25 Sep 2026, 00:39 UTC

Resolved 17:28Started 2Timeline events

Confirmed by the official source.

Executive summary

Summary
Cloudflare confirmed a minor disruption affecting Browser Isolation session data synchronization. A fix has been implemented, and Cloudflare is monitoring the results.

What users experienced

User impact
Browser Isolation customers may encounter errors stating that browser storage is unavailable when acquiring a browser and may need to sign in to web applications again. Browsers remain usable during the disruption.

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Started

17:2824 Sep 2026

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Timeline events

Timeline of the incident

24 Sep 2026, 17:30 UTC
Detection
Confirmed by an official service source.
25 Sep 2026, 00:39 UTC
Resolution
The service is no longer reporting this incident as active.

What we know

✓The affected component is Cloudflare Browser Isolation.
✓The reported impact is minor and the component is in a degraded-performance state.
✓Cloudflare initially reported that it was investigating the session data synchronization issue.
✓Cloudflare later reported that a fix had been implemented and that it was monitoring the results.