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Outage in Semaphore

Periodic authentication failure with GitHub repositories

Resolved Minor
September 02, 2026 - Started 1 day ago - Lasted about 4 hours
Official incident page

Incident Report

Summary AI Generated

Semaphore 2.0 experienced periodic authentication failures with GitHub repositories over approximately 4 hours due to a broader GitHub-side outage affecting HTTPS operations. Users faced disrupted CI/CD pipelines, with jobs hanging or failing during git authentication. The issue was resolved once the underlying GitHub HTTPS problem subsided, with a temporary workaround available to force HTTP/1.1 via git config.

We are currently investigating this issue.
Components affected
Semaphore 2.0

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Latest Updates ( sorted recent to last )
RESOLVED 1 day ago - at 09/02/2026 03:16PM

This incident has been resolved.

MONITORING 1 day ago - at 09/02/2026 02:19PM

There was a wider situation impacting HTTPS operations, which also affected Semaphore and our users
https://github.com/orgs/community/discussions/206581

The issue has since appeared to subside, but we're continuing to monitor the situation on our end.

IDENTIFIED 1 day ago - at 09/02/2026 01:56PM

We have found that this is currently a wider situation impacting HTTPS operations, which is also affecting Semaphore and our users. You can read more about this in this thread:
https://github.com/orgs/community/discussions/206581

As a workaround, you can configure git to use only HTTP/1.1, using the following command:
git config --global http.version HTTP/1.1

We are continuing to monitor and investigate this situation on our end.

IDENTIFIED 1 day ago - at 09/02/2026 01:29PM

We have found that this is currently a wider situation impacting HTTPS operations, which is also affecting Semaphore and our users. You can read more about this in this thread:
https://github.com/orgs/community/discussions/206581

As a workaround, you can configure git to use only HTTP/1.1, using the following command:
git config --global http.version HTTP/1.1

We are continuing to monitor and investigate this situation on our end.

IDENTIFIED 1 day ago - at 09/02/2026 12:53PM

We have found that this is currently a wider situation impacting HTTPS operations, which is also affecting Semaphore and our users. You can read more about this in this thread:
https://github.com/orgs/community/discussions/206581

As a workaround, you can configure git to use only HTTP/1.1, using the following command:
git config --global http.version HTTP/1.1

Please also note that we are continuing to monitor and investigate this situation on our end.

INVESTIGATING 1 day ago - at 09/02/2026 12:18PM

We are continuing to investigate this issue.

INVESTIGATING 1 day ago - at 09/02/2026 11:44AM

We are still looking into the cause of this issue, but as a temporary workaround, you can add the following environment variable to your jobs, which will cause them to immediately fail and not hang:

GIT_TERMINAL_PROMPT=0

After they fail, you can rerun the pipeline, and only the failed jobs should rerun, allowing you to work through this issue until we have more information to share.

INVESTIGATING 1 day ago - at 09/02/2026 11:17AM

We are currently investigating this issue.

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