Disruption with some GitHub services

Incident Report for GitHub

Resolved

On September 26, 2025 between 16:22 UTC and 18:32 UTC raw file access was degraded for a small set of four repositories. On average, raw file access error rate was 0.01% and peaked at 0.16% of requests. This was due to a caching bug exposed by excessive traffic to a handful of repositories.

We mitigated the incident by resetting the state of the cache for raw file access and are working to improve cache usage and testing to prevent issues like this in the future.

Posted Sep 25, 2025 - 17:36 UTC

Update

We are seeing issues related to our ability to serve raw file access across a small percentage of our requests.

Posted Sep 25, 2025 - 17:06 UTC

Investigating

We are currently investigating this issue.

Posted Sep 25, 2025 - 17:00 UTC