{"id":"INC-anthropic-j160kkjmm2n1","kind":"incident","aliases":[],"related":[],"title":"Anthropic: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5","description":"The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.","summary":null,"severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Anthropic","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["ai","anthropic","incident","llm","ops","vendor"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"resolved","published_at":"2026-08-13T14:33:45+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","triaged_at":"2026-10-23T21:55:04+00:00","updated_at":"2026-10-23T21:55:04+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'5':7A,10A,14A,31C,35C 'affect':28C 'ai':20B 'anthrop':1A,21B 'anthropic':17A,19A 'claud':5A,8A,12A,29C,33C 'elev':2A 'error':3A 'fabl':9A,34C 'inc':16A 'inc-anthropic-j160kkjmm2n1':15A 'incid':22B 'issu':27C 'j160kkjmm2n1':18A 'llm':23B 'mytho':6A,30C 'op':24B 'resolv':38C 'sonnet':13A 'vendor':25B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-08-13T14:33:45+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"anthropic:j160kkjmm2n1","url":"https://stspg.io/pbnrks0mrn4w","severity":"high","published_at":"2026-08-13T14:33:45+00:00","modified_at":"2026-08-14T10:28:21+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","fetched_at":"2026-10-26T07:41:33+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"}