[Medium] Issues with Uploads and Downloads

What to do

• Check whether you use Box Uploads/Downloads, Uploads/Downloads. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 22m it lasted.

  Anything that failed between 2026-08-04 20:23 UTC and 2026-08-04 20:44 UTC may need a replay.

• Subscribe to Box's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=box works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Box 3

1. investigatingAug 4, 2026, 8:23 PM UTC

   Our team is investigating an issue with Uploads and Downloads in Box. Users may see errors or slowness when attempting to upload or download items. We will provide additional information as it becomes available.

   provider

2. resolvedAug 4, 2026, 8:44 PM UTC

   Our team has taken steps to remediate this issue and the uploads and downloads service has returned to full functionality. If you continue to experience any issues, please contact Box Support at https://support.box.com.

   provider

3. postmortemAug 11, 2026, 2:54 AM UTC

   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 retransmit errors. # Corrective Actions Box has initiated the following corrective actions: * Improve monitoring and alerting for the isolated TCP retransmit issues. * Review and update operational runbooks for isolating problematic instances and for capacity management to shorten time to mitigation. ‌ 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

   provider

Corrections

None so far.

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