Auth issue impacted GitHub APIs and some Slack and Teams subscriptions
Original: Accidentally deleted subscriptions for chat integrations (Slack and MS Teams)
A GitHub auth incident briefly affected APIs and some Slack and Teams repository subscriptions.
GitHub resolved an incident on June 5, 2026 involving incorrect authorization failures for some authenticated requests. During 14:49-16:45 UTC, a small number of endpoints saw a 1-2% increase in 4xx responses, while most requests completed normally. The issue was tied to a recently enabled feature flag, which GitHub disabled; affected Slack and Teams subscriptions were later restored.
This GitHub service incident is not a new AI model feature or developer tool announcement — it is a platform reliability incident. According to the GitHub Status page, the incident occurred on June 5, 2026, initially described as partial performance impact across some GitHub services. GitHub subsequently clarified that users might see unexpected repository unsubscription events in their Slack or Microsoft Teams channels. A later update indicated that these anomalous chat integration subscriptions were related to the same authorization issue.
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