# GitHub Copilot: Auth issue resulting in API impacts, including some Slack and Teams channel subscriptions

> GitHub Copilot status incident “Auth issue resulting in API impacts, including some Slack and Teams channel subscriptions” on 2026-06-05: impact minor (vendor’s label), 5.0 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv
Last updated: 2026-06-05T22:21:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-06-05 17:20 UTC · Resolved: 2026-06-05 22:21 UTC · Duration: 5.0 h
- Updates: 1
- [Vendor status page: https://www.githubstatus.com/incidents/2nmfnbknhlnv](https://www.githubstatus.com/incidents/2nmfnbknhlnv)
- [Company: GitHub Copilot](https://rewindex.com/company/github-copilot.md)

## Timeline of updates

- **resolved** 2026-06-05 22:21 UTC: On June 5, 2026, between 15:35 UTC and 16:45 UTC, 0.11% of authenticated REST API requests incorrectly returned “not found” responses. Impact was concentrated among - and significantly higher for - users authenticating with user-to-server tokens to access organization-owned repositories. Some users of our GitHub for Slack and GitHub for Microsoft Teams integrations saw their channel subscriptions removed as those systems interpreted the transient "not found" response as durable loss of access. Roughly 12% of organizations with active channel subscriptions were impacted, with ~2% of all channel subscriptions being removed. These issues were triggered by a change to an internal authorization component that did not correctly resolve access for user-to-server tokens against organization-owned repositories. We mitigated the incident by disabling the accompanying feature flag at 16:45 UTC, after which API responses returned to normal. We then restored all impacted Slack and Microsoft Teams channel subscriptions, with restoration completed at 22:21 UTC. We are working to add retry and grace-period logic in the chat integrations so transient errors no longer trigger subscription deletions. In parallel, we are improving observability and gating of authorization changes so downstream impact is detected during scoped, gradual rollouts.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by GitHub Copilot, started 2026-06-05 17:20 UTC, resolved after 5.0 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv
- Citation: GitHub Copilot, “Auth issue resulting in API impacts, including some Slack and Teams channel subscriptions” (2026-06-05 17:20 UTC). Archived by Rewindex: https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv (CC BY 4.0).
- Markdown link: `[GitHub Copilot: Auth issue resulting in API impacts, including some Slack and Teams channel subscriptions (2026-06-05)](https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv)`


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Canonical: https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv · Markdown: https://rewindex.com/company/github-copilot/incidents/2nmfnbknhlnv.md · JSON: https://rewindex.com/api/v1/companies/github-copilot/incidents/2nmfnbknhlnv · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T15:33:25.361Z