# CircleCI change history

Filter: kind=all. Query: `?kind=notable|all|pages|pricing|trust|legal|incident|incident_edit|incident_deleted|incident_update&history=<history_id>&page=N`. Company profile: [CircleCI](https://rewindex.com/company/circleci.md)
## Changes by kind

| Kind | Changes | Notable | Latest (UTC) |
| --- | --- | --- | --- |
| Major incident | 6 | 6 | 2026-10-09 11:33 UTC |

## Timeline

| When (UTC) | Kind | Change | Label | Summary |
| --- | --- | --- | --- | --- |
| 2026-10-09 11:33 UTC | Major incident | [Major incident: Delay in data appearing in UI and API](https://rewindex.com/change/ic037c9aab45743.md) | degradation | CircleCI reported a major degradation starting 2026-10-09 11:33 UTC, resolved 2026-10-10 02:08 UTC after 14 h 35 min. Customers experienced pipeline, workflow and job delays and failures, delayed UI/API data, and disrupted webhooks and Slack/email notifications; retriggering could create duplicate pipelines. The vendor identified a delay in its data infrastructure. |
| 2026-10-06 16:00 UTC | Major incident | [Major incident: Delays in pipelines, workflows, UI data, and notifications](https://rewindex.com/change/ibc84b3440158fe.md) | degradation | CircleCI reported a major incident starting 2026-10-06 16:00 UTC, lasting 5 h 18 min and resolved at 21:18 UTC. Customers experienced pipeline failures, periods when no workflows or jobs started, and delayed UI data, notifications, webhooks, and commit status updates; workflows and jobs were starting normally by 20:31 UTC, and customers whose jobs failed to start were advised to rerun them. |
| 2026-08-17 14:04 UTC | Major incident | [Major incident: GitHub Incidents impacting CircleCI functionality](https://rewindex.com/change/if07a92160c0000.md) | degradation | CircleCI reported major degradation affecting pipeline triggering and login, with possible failures reporting running jobs’ status to GitHub Pull Requests. The incident ran from 2026-08-17 14:04 UTC to 2026-08-17 19:05 UTC, lasting 5 h 1 min. CircleCI attributed the disruption to a GitHub incident and resolved it after GitHub’s APIs appeared to be operating normally. |
| 2026-07-02 15:25 UTC | Major incident | [Critical incident: Outage impacting web experience and pipelines starting](https://rewindex.com/change/ic34ccb54b4c224.md) | outage | CircleCI reported a critical outage affecting UI access/login and pipeline starts, including API-triggered pipelines, starting 2026-07-02 15:25 UTC and resolving 2026-07-02 16:44 UTC (1 h 18 min). Increased system load caused API request failures; mitigation restored service, and CircleCI advised resubmitting failed pipelines. |
| 2026-06-23 18:34 UTC | Major incident | [Major incident: Delays starting Docker jobs](https://rewindex.com/change/id28b258c7106a0.md) | degradation | CircleCI reported a major Docker Jobs incident from 2026-06-23 18:34 UTC to 2026-06-23 19:58 UTC (1 h 23 min), with jobs queuing or stuck in "preparing environment." A fix restored normal starts while the backlog cleared; the postmortem identified a single Docker job cluster operating below expected performance. |
| 2026-06-07 04:20 UTC | Major incident | [Major incident: macOS jobs failing to start](https://rewindex.com/change/i6db5c6a27fae8e.md) | outage | CircleCI reported a major incident preventing macOS jobs across all resource classes from starting, from 2026-06-07 04:20 UTC to 2026-06-07 04:44 UTC (24 min). A fix restored normal job starts; customers whose jobs failed to start during the incident may rerun them. |


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Canonical: https://rewindex.com/company/circleci/changes · Markdown: https://rewindex.com/company/circleci/changes.md · JSON: https://rewindex.com/api/v1/companies/circleci/changes · Generated 2026-10-18T02:25:37.748Z