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Semaphore CI Outage History

Daily provider-status observations and published incident history for Semaphore CI.

Operational

Semaphore CI is operational. Verified . Official provider source.

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72.2% of 36 verified observed days had no reported provider issue

90-Day Trend

Jul 3Sep 30

Dashed calendar markers below identify legacy observations whose source-at-observation was not recorded.

Monthly Status Summary

Month Issue-free days Days Tracked Days with issues
September 2026 76.7% 30 7

This percentage summarizes normalized provider-status observations by calendar day. It is not duration-based, component-weighted, or contractual uptime. See the methodology and limitations.

Recorded Daily Status (Last 91 Days)

Jul 2 Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data

Incident History

September 2026
Delays in job processing
major Observed active window 52m

View incident details and source

Started:

Semaphore
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Intermittent cache connection errors
minor Observed active window 41m

View incident details and source

Started:

Semaphore
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Delays in job processing
minor Observed active window 2h 4m

View incident details and source

Started:

Semaphore
monitoring
A fix has been implemented and we are monitoring the results.
identified
We are continuing to work on a fix for this issue.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Periodic authentication failure with GitHub repositories
minor Observed active window 24h 31m

View incident details and source

Started:

Semaphore
identified
Our engineers are actively monitoring the intermittent issue affecting Git operations over HTTPS. We will share another update when more information becomes available. To prevent affected builds from stalling while waiting for credentials, our engineering team has implemented fail-fast behavior. Affected builds will now fail promptly, reducing unnecessary runtime. If the issue persists after rerunning the job, add the following command to the job before the affected Git operation to force G...
identified
Our engineers are actively monitoring the ongoing situation affecting HTTPS operations: https://github.com/orgs/community/discussions/206581. We’ll share the next update once we have new information from GitHub. 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
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
identified
The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: 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 the situation on our end and will share further updates as they become available.
Periodic authentication failure with GitHub repositories
minor Observed active window 4h 3m

View incident details and source

Started:

Semaphore
monitoring
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
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
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
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
We are continuing to investigate this issue.
investigating
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
We are currently investigating this issue.
August 2026
Delays in job processing
critical Observed active window 10h 3m

View incident details and source

Started:

Semaphore
monitoring
Our team is still monitoring the results.
monitoring
We are continuing to monitor for any further issues.
monitoring
A fix has been implemented and we are monitoring the results.
identified
Our engineering team is actively working to resolve this issue.
identified
We are continuing to work on a fix for this issue.
identified
Our team is continuing to work on a fix for this issue.
identified
We are continuing to work on a fix for this issue.
identified
We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.
identified
We are continuing to work on a fix for this issue.
identified
We are continuing to work on a fix for this issue.
identified
We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.
identified
We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.
identified
We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.
identified
We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.
identified
We’ve identified network connectivity issues between our control plane and build servers. We’re actively working to restore normal service.
identified
We are continuing to work on a fix for this issue.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Delays in job processing
minor Observed active window 1h 52m

View incident details and source

Started:

Semaphore
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.
investigating
We are currently investigating this issue.
Delays in Job Processing
major Observed active window 55m

View incident details and source

Started:

Semaphore
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.
investigating
We are continuing to investigate this issue.
investigating
We are currently investigating this issue.
Platform Outage
critical Observed active window 46m

View incident details and source

Started:

Semaphore
monitoring
We are continuing to monitor for any further issues.
monitoring
A fix has been implemented and we are monitoring the results.
identified
The issue has been identified and a fix is being implemented.

Legacy Incident Archive

12 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.

May 2026
Delays when checking out GitHub repos via SSH
minor Source not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented, and everything should be back to normal. The previously shared snippets can be removed.
identified
We identified slow GitHub operations related to problems with the network, and we deployed a fix to re-route those operations to a healthier server. Some HTTPS operations started to fail because of that. To disable the fix, you should use the command: sudo sed -i 's/^\([0-9].*github\.com\)/#\1/' /etc/hosts And to re-enable, you can use: sudo sed -i 's/^#\([0-9].*github\.com\)/\1/' /etc/hosts
monitoring
A fix has been implemented and we are monitoring the results.
identified
We identified slow communication between Semaphore jobs and GitHub. We are continuing to work with our upstream provider to resolve this. For impacted jobs, please replace the normal checkout command with the following: retry --times 5 "timeout 40 bash -lc 'source ~/.toolbox/toolbox; checkout'" And afterwards, use cd to change the directory to the cloned repository (replace with your project).
Delays when checking out GitHub repos via SSH
minor Source not attested
Last archived state: resolved
View archived record details
monitoring
We are not currently seeing timeouts related to slow connections. Our team is continuing to monitor the situation to confirm that service has fully returned to normal.
identified
We identified that the issue is slow communication between our jobs and GitHub. We are currently working with our upstream provider to to resolve this. For impacted jobs, please replace the normal checkout command with the following: retry --times 5 "timeout 40 bash -lc 'source ~/.toolbox/toolbox; checkout'" And afterwards, use cd <dir> to change the directory to the cloned repository (replace <dir> with your project).
investigating
We are continuing to investigate this issue.
investigating
We are currently investigating this issue.