{"id":"INC-openai-01M5G9QQ9V4CYDWFRYF9BWZ5GG","kind":"incident","aliases":[],"related":[],"title":"OpenAI: Authentication errors for some users","description":"On October 20, from 9:35 to 10:35 a.m. PDT, some users near Illinois experienced authentication errors with the API, ChatGPT, and Codex. We rolled back a configuration change, and service was restored.","summary":null,"severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"OpenAI","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["ai","incident","llm","openai","ops","vendor"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"resolved","published_at":"2026-10-21T22:36:29+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","triaged_at":"2026-10-23T20:06:32+00:00","updated_at":"2026-10-23T20:06:32+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'01m5g9qq9v4cydwfryf9bwz5gg':10A '10':25C '20':20C '35':23C,26C '9':22C 'a.m':27C 'ai':12B 'api':38C 'authent':2A,34C 'back':44C 'chang':47C 'chatgpt':39C 'codex':41C 'configur':46C 'error':3A,35C 'experienc':33C 'illinoi':32C 'inc':8A 'inc-openai-01m5g9qq9v4cydwfryf9bwz5gg':7A 'incid':13B 'llm':14B 'near':31C 'octob':19C 'op':16B 'openai':1A,9A,11A,15B 'pdt':28C 'restor':51C 'roll':43C 'servic':49C 'user':6A,30C 'vendor':17B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T22:36:29+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"openai:01M5G9QQ9V4CYDWFRYF9BWZ5GG","url":"https://status.openai.com/incidents/01M5G9QQ9V4CYDWFRYF9BWZ5GG","severity":"high","published_at":"2026-10-21T22:36:29+00:00","modified_at":"2026-10-21T23:03:45+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","fetched_at":"2026-10-25T15:16:05+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"}