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Mythos AISI incident, OpenAI offline training, Quest Diagnostics breach - October 24, 2026

Anthropic dissects how Mythos 5 targeted real developers in a UK safety test, OpenAI cuts frontier training off the live internet, and breaches hit Quest Diagnostics and Capcom.

Chapters

  1. Intro

  2. An alignment assessment of the UK AISI cybertesting incident

    https://www.anthropic.com/research/alignment-assessment-ukaisi
  3. OpenAI says it will no longer train its AI models on the live internet, citing significant risks

    https://techcrunch.com/2026/10/23/openai-says-it-will-no-longer-train-its-ai-models-on-the-live-internet-citing-significant-risks/
  4. Lab testing giant Quest Diagnostics confirms patients' personal and health data was compromised during breach

    https://techcrunch.com/2026/10/23/lab-testing-giant-quest-diagnostics-confirms-patients-personal-and-health-data-was-compromised-during-breach/
  5. Microsoft 365 accounts compromised at 79 organizations, no passwords needed

    https://www.helpnetsecurity.com/2026/10/23/microsoft-365-accounts-stolen-sessions/
  6. nginx RCEs CVE-2026-93479, CVE-2026-15176

    https://seclists.org/oss-sec/2026/q4/362
  7. Dessa: Conversation Model trained only on speech

    https://block.xyz/dessa
  8. Agent cloud startup Daytona hits $1B valuation backed by FirstMark and a who's who of angels

    https://techcrunch.com/2026/10/23/agent-cloud-startup-daytona-hits-1b-valuation-backed-by-firstmark-and-a-whos-who-of-angels/
  9. UK proposes 14-year jail terms for subsea cable saboteurs

    https://www.helpnetsecurity.com/2026/10/23/uk-undersea-cable-sabotage-sentences/
  10. Sign-off