Wednesday September 3, 2025

Summary

On September 3, 2025, between 3:00 PM and 5:40 PM PDT, some iOS users running Slack app version 25.09.10 saw a "Jailbroken devices can't use Slack" error message.

A recently enabled toggle for jailbreak protection (which prevents apps from running on devices with removed software restrictions) unexpectedly introduced a backend check that incorrectly identified the installed iOS version. This caused some users' devices to be improperly flagged, preventing them from using or opening the app. We promptly rolled back the related feature toggle, restoring access for all affected users. We're working on improving this area of code to reduce the likelihood of this recurring.

11:32 AM PST

Resolved

This issue is now resolved for all users.

We have identified the issue, and a patch has been developed to restore services for impacted customers on iOS. The update has been made available via the App Store. All impacted customers can now manually update via this update to resolve the issue. Thank you for your patience. 

5:47 PM PST

Update

After further investigation, we have identified that this behavior appears to be isolated to users on iOS version 18.6.2. We have paused the rollout of version 25.09.10 of the app and continue to investigate possible causes of this behavior. We'll be back with another update as soon as we know more, and appreciate your patience while we sort this out. 
 

2:40 PM PST

Investigating

We're investigating an issue where users are reporting trouble opening version 25.09.10 of the Slack app for iOS, and are encountering the following error message:
Jailbroken devices can’t use Slack
For security reasons, [WORKSPACE] doesn’t allow jailbroken devices (like this one) to access Slack.
If you need help, please contact your IT administrator.

We will provide an update as soon as more information becomes available.

2:00 PM PST