Box outage, 4 August 2026
[Medium] Issues with Uploads and Downloads
- Started
- Resolved
- 4 Aug 2026, 20:44 UTC (after 22 min)
- Impact
- Major
- Affected
- Uploads/Downloads
Last update from Box
On August 4, 2026 between 12:10 PM PDT and 1:20 PM PDT, some customers experienced failures and delays when uploading files to Box. The problem was caused by a routing issue on our frontend load balancers. We restored service by rerouting upload traffic and provisioning additional capacity. # Analysis A temporary network connectivity disruption impacted a small part of our load balancing fleet, causing a spike of TCP retransmit errors. Our engineering team mitigated the impact by redirecting traffic away from the affected region, which restored normal upload operations and resolved the errors. This incident highlighted opportunities to improve observable signals and alerting for TCP retran...
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