We recently addressed issues affecting Authentication, File Access, Notes, Uploads, and Public API. We would like to take the opportunity to further explain these issues and the steps we have taken to keep them from happening in the future.

On June 3, 2026 between 10:53 PM and 10:58 PM PDT, some customers may have experienced issues when attempting to sign in to Box and when accessing files, notes, uploads, and our public API. The issue was caused by a temporary fluctuation in a database shard due to elevated disk activity, which led to connection saturation and service errors for a subset of users. Service returned to normal by 10:58 PM PDT and monitoring remains in place to watch for recurrence.

Analysis

As part of our routine system maintenance, we deployed standard software updates to our infrastructure. Following these updates, a scheduled background system scan processed a larger-than-normal volume of files. This background activity led to temporary resource contention on the database tier, resulting in brief latency and connection saturation for a subset of users.

While Box utilizes redundant database replicas to ensure high availability, our automated monitoring and failover systems did not immediately redirect traffic because the database remained partially responsive.

Corrective Actions

Box has initiated the following corrective actions:

• Implemented strict I/O resource limits on background maintenance processes to ensure they cannot impact active user traffic.
• Upgraded our database monitoring and health checks to immediately detect and alert on localized resource contention, ensuring faster automated failover response.

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We are continuously working to improve Box and want to make sure we are delivering the best product and user experience we can. We hope we have provided some clarity here and we would be happy to answer any questions you may still have regarding this matter.

Sincerely,
The Box Team