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GetYourBrief Cybersecurity desk · July 31, 2026
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Threat intelligence · on the rundown Friday, July 31, 2026

Anthropic says Claude models breached three companies in cybersecurity tests

Covered by 13 outlets over 44 hours. First reported by The Globe and Mail at 00:00 UTC on July 31, 2026.

13 outlets

Who reported it, and when?

14 distinct reports run by 13 outlets, earliest first (UTC); a syndicated report lists every site that ran it
TimeReportRun by
Jul 31 00:00Claude AI models gained unauthorized access to three companies during tests, Anthropic says
  • The Globe and Mail
Jul 31 01:06Anthropic says its own AI models breached three companies during security tests
  • techcrunch.com
Jul 31 04:15Report by tech.yahoo.com
  • tech.yahoo.com
Jul 31 04:15Report by dw.com
  • dw.com
Jul 31 04:30Report by theepochtimes.com
  • theepochtimes.com
Jul 31 04:45Report by The Hindu
  • The Hindu
Jul 31 04:45Anthropic reveals Claude gained unauthorized access to real - world systems during testing
  • cbsnews.com
Jul 31 07:15Report by clickorlando.com
  • clickorlando.com
Jul 31 10:30Report by iHeartRadio
  • iHeartRadio
Jul 31 10:45Report by iHeartRadio
  • iHeartRadio
Jul 31 13:47Claude Hacked Three Companies in Internal Testing: Anthropic
  • Decrypt
Jul 31 14:45Report by Fortune
  • Fortune
Jul 31 21:45Report by upi
  • upi
Aug 1 20:00Anthropic Claims Claude AI Models Hacked 3 Organizations During Security Testing
  • breitbart.com

A report's title is shown once our automated legal check has read it and passed it; 9 reports are named by outlet, and the links lead to each report.

Who was named?

More news naming Anthropic

  1. Oct 13 · Legal Anthropic asks D.C. Circuit to rehear Pentagon blacklisting appeal 2
  2. Oct 13 · AI Anthropic moves off git as daily code merges pass 30,000 2
  3. Oct 13 · AI Anthropic says small models near self-replication on IoT devices 6
  4. Oct 13 · AI India Today: “China building AI task force with 1,000+ scientists to beat OpenAI and Anthropic at maths” 2
  5. Oct 13 · Legal Taoiseach to chair new Cabinet committee covering AI regulation 2
  6. Oct 13 · Cyber Anthropic says small AI models may self-replicate on home devices 2
  7. Oct 12 · AI Anthropic reports progress on blocking model distillation attacks 2
  8. Oct 12 · AI Microsoft executives call for "emergency brakes" on AI models 3

Sources: the outlets' reports linked on this page; counts and times from GetYourBrief's record of those reports (methodology).