Wednesday July 2, 2025

Starting at 11:55 AM PDT to 1:51 PM PDT on July 2, 2025, some users experienced issues uploading files, including images. Files and images that were uploaded prior to this issue were not affected.

This issue manifested as an error message for some users, while others experienced uploads that appeared to complete but were inaccessible.

We traced this back to a misconfiguration within our file handling service causing incorrect service permissions. We identified the problematic code change and reverted them, restoring functionality to all affected users.

4:49 PM PST

This issue is now resolved for all users.

• Current status and recent actions taken: We implemented a fix to a backend configuration that resolves the issue. Users are able to upload/download images and files in Slack as intended.
• Scope: Users across all regions may have experienced trouble uploading/downloading images and files in Slack.
• Previous impact to end users: Users may have observed delays when uploading/downloading images and files in Slack. For users who received errors during the incident, the uploads were unsuccessful. For users who did not receive an error after uploading their file but were unable to view it, those files are intact and available. All files uploaded before this issue are available.

Thank you for your patience as we worked to resolve this issue. We apologize for any disruptions to your day.

2:02 PM PST

The fix we implemented showed some improvement with files, but we're noticing an uptick in errors that we're investigating.

• Current status and actions being taken: We're investigating the increase of errors and working on a forward fix. Some users may still experience additional trouble with file uploads or downloads.

We'll provide another update in 30 minutes until impact is resolved for all users.

1:33 PM PST

We’re observing improvements to images and file sending, and are monitoring our health metrics. Affected users may see successful images and file sends.

Current status and recent actions taken: We implemented a fix to a recent configuration update and are observing signs of recovery. 

We’ll be back with another update once the issue is fully resolved. We appreciate your patience.

12:47 PM PST

We’re still investigating potential causes for this issue, but we have determined that users may see that uploads are taking a long time and observe issues when viewing files that another user has sent.

Current status and actions being taken: We’re actively investigating potential causes.

Estimated time to resolution: No estimated time.

Scope: Users across all regions may be experiencing trouble sending images and files in Slack.

Current impact to end users: Some users are reporting trouble with sending images and files in Slack, the uploads may appear stuck or continuously loading. 

Known workarounds: No known workarounds.

We'll continue to provide updates every 30 minutes until the impact is resolved for all users.

12:28 PM PST

Some users are reporting trouble with sending images and files in Slack, the uploads may appear stuck or continuously loading. We'll be back with an update as soon as we know more.

12:07 PM PST