Live › incident › INC-github-gx7js8bd0jpz
Go to dashboardGitHub Actions Larger Runners could not start jobs, and Actions Runners and Runner Groups could not be viewed or managed through the UI and API, from August 18, 2026 05:02 to 11:30 UTC. The cause was an expired authentication certificate for a backend service; the sources describe an outage and do not report any attacker access or data exposure.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:12 UTC. All times on this page are UTC.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| GitHub | vendor | – | – |
Unknown from the sources.
No customer action is stated in the sources; GitHub completed enabling the rotated certificate in its backend and says it added monitoring for this and other certificates.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
On August 18, 2026, between 05:02 UTC and 11:30 UTC, customers were unable to run jobs on Actions Larger Runners and were unable to view or manage Actions Runners and Runner Groups through the GitHub UI and API. These issues were caused by failures in backend requests resolving essential metadata for starting Larger Runner workflow runs and for reading runner and runner group data. The failures were caused by an expired authentication certificate unique to this service. The certificate had been rotated in KeyVault, but a step to enable use at runtime had been paused to prevent recurrence of previous incidents that had been triggered by this operation. We mitigated the issues by completing the enablement of the new certificate in the backend system. We have added additional monitoring to this and other certificates. The relevant service is also in the process of being replaced as part of our availability and scale work, bringing this authentication path and secret management in line with patterns across all GitHub services.
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