# GitHub Copilot: Issue Attachments Failing to Upload

- Impact (vendor’s label): major
- Status: resolved
- Started: 2025-05-01 22:28 UTC · Resolved: 2025-05-01 23:13 UTC · Duration: 45 min
- Updates: 1
- [Vendor status page: https://www.githubstatus.com/incidents/9zmv2mqqxsbm](https://www.githubstatus.com/incidents/9zmv2mqqxsbm)
- [Company: GitHub Copilot](https://rewindex.com/company/github-copilot.md)

## Timeline of updates

- **resolved** 2025-05-01 23:13 UTC: On May 1, 2025 from 22:09 UTC to 23:13 UTC, the Issues service was degraded and users weren't able to upload attachments. The root cause was identified to be a new feature which added a custom header to all client-side HTTP requests, causing a CORS errors when uploading attachments to our provider. We mitigated the incident by rolling back the feature flag that added the new header at 22:56 UTC. In order to prevent this from happening again, we are adding new metrics to monitor and ensure the safe rollout of changes to client-side requests.

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


---
Canonical: https://rewindex.com/company/github-copilot/incidents/9zmv2mqqxsbm · Markdown: https://rewindex.com/company/github-copilot/incidents/9zmv2mqqxsbm.md · JSON: https://rewindex.com/api/v1/companies/github-copilot/incidents/9zmv2mqqxsbm · Generated 2026-10-18T10:24:09.649Z