Slack outage, 8 June 2026

Some users unable to sign in

Started
Resolved
8 Jun 2026, 19:35 UTC (after 36 min)
Impact
Minor
Affected
Login/SSO

Last update from Slack

The issue affecting SMS-based two-factor authentication for users in EMEA has been resolved, and all services are now functioning as expected. We have adjusted configuration settings to restore normal service and will continue to monitor the situation to ensure stability. We apologize for how you and your business may have been affected by this. We will perform a full investigation of the incident, confirming the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future.

8 Jun 2026, 19:35 UTC

Read the full incident on the official Slack status page

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