{"id":"INC-twilio-byymx2cv0kt1","kind":"incident","aliases":[],"related":[],"title":"Twilio: SMS Delivery Receipt Failures from Twilio to Claro Costa Rica","description":"Twilio customers may be experiencing SMS delivery receipt failures from Twilio to Claro network subscribers in Costa Rica. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be failing. We will provide another update in 1 hour or as soon as more information becomes available.","summary":null,"severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Twilio","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["incident","ops","sms","twilio","vendor"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-12T22:31:16+00:00","first_seen_at":"2026-11-12T22:33:10+00:00","triaged_at":"2026-11-12T22:34:14+00:00","updated_at":"2026-11-12T22:37:49+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'1':63C 'activ':43C 'anoth':60C 'avail':72C 'becom':71C 'byymx2cv0kt1':15A 'claro':9A,34C 'costa':10A,38C 'custom':23C 'deliveri':3A,28C,48C,52C 'experienc':26C 'fail':56C 'failur':5A,30C 'hour':64C 'inc':13A 'inc-twilio-byymx2cv0kt1':12A 'incid':17B 'inform':70C 'investig':44C 'issu':46C 'may':24C,49C,54C 'messag':47C 'network':35C 'op':18B 'provid':59C 'receipt':4A,29C,53C 'rica':11A,39C 'sms':2A,19B,27C 'soon':67C 'subscrib':36C 'succeed':50C 'team':41C 'twilio':1A,7A,14A,16A,20B,22C,32C 'updat':61C 'vendor':21B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":null,"audience":null,"plain_action":null,"pkeys":["twilio"],"ptokens":["twilio"],"labels":["incident","medium","ops","sms","twilio","vendor"],"campaign_type":null,"search_a":"'byymx2cv0kt1':15A 'claro':9A 'costa':10A 'deliveri':3A 'failur':5A 'inc':13A 'inc-twilio-byymx2cv0kt1':12A 'receipt':4A 'rica':11A 'sms':2A 'twilio':1A,7A,14A,16A","search_b":"'incid':17B 'op':18B 'sms':19B 'twilio':20B 'vendor':21B","search_c":"'1':63C 'activ':43C 'anoth':60C 'avail':72C 'becom':71C 'claro':34C 'costa':38C 'custom':23C 'deliveri':28C,48C,52C 'experienc':26C 'fail':56C 'failur':30C 'hour':64C 'inform':70C 'investig':44C 'issu':46C 'may':24C,49C,54C 'messag':47C 'network':35C 'provid':59C 'receipt':29C,53C 'rica':39C 'sms':27C 'soon':67C 'subscrib':36C 'succeed':50C 'team':41C 'twilio':22C,32C 'updat':61C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-12T22:31:16+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"twilio:byymx2cv0kt1","url":"https://stspg.io/kwdmd91r9qjd","severity":"medium","published_at":"2026-11-12T22:31:16+00:00","modified_at":"2026-11-12T22:31:16+00:00","first_seen_at":"2026-11-12T22:33:10+00:00","fetched_at":"2026-11-12T23:02:52+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}