{"id":"INC-circleci-tqh9zwszp05w","kind":"incident","aliases":[],"related":[],"title":"CircleCI: Increased 500 Errors on Pipeline and Workflow API Endpoints and UI","description":"Between 13:29 UTC and 18:20 UTC on June 9, 2026, some customers experienced 500 errors when making requests to the pipeline values and workflow API endpoints, as well as errors in the UI. Jobs running were not impacted during this window. The issue has been resolved and all affected functionality has returned to normal. We thank you for your patience while our team worked on implementing a fix.","summary":null,"severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"CircleCI","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["ci","circleci","incident","ops","vendor"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"resolved","published_at":"2026-06-09T17:45:04+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","triaged_at":"2026-10-25T05:33:19+00:00","updated_at":"2026-10-25T05:33:19+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'13':24C '18':28C '20':29C '2026':34C '29':25C '500':3A,38C '9':33C 'affect':73C 'api':9A,49C 'ci':18B 'circleci':1A,15A,17A,19B 'custom':36C 'endpoint':10A,50C 'error':4A,39C,54C 'experienc':37C 'fix':92C 'function':74C 'impact':62C 'implement':90C 'inc':14A 'inc-circleci-tqh9zwszp05w':13A 'incid':20B 'increas':2A 'issu':67C 'job':58C 'june':32C 'make':41C 'normal':78C 'op':21B 'patienc':84C 'pipelin':6A,45C 'request':42C 'resolv':70C 'return':76C 'run':59C 'team':87C 'thank':80C 'tqh9zwszp05w':16A 'ui':12A,57C 'utc':26C,30C 'valu':46C 'vendor':22B 'well':52C 'window':65C 'work':88C 'workflow':8A,48C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-06-09T17:45:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"circleci:tqh9zwszp05w","url":"https://stspg.io/frwqpjlwzb9r","severity":"medium","published_at":"2026-06-09T17:45:04+00:00","modified_at":"2026-06-09T18:43:23+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","fetched_at":"2026-10-25T13:16:06+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}