Claude · incidentThree cybersecurity evaluation incidents

Valid from

2026-07-30

Valid until

still holds

Published

2026-07-30

Recorded by AsOf

2026-10-29

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“In a review of our cybersecurity evaluation transcripts, we found three incidents in which a Claude model reached the internet from within or while interacting with a third-party evaluation environment, and then gained unauthorized access to the real systems of three different organizations.”— what the page says, read 2026-10-31

• Investigating three incidents in our cybersecurity evaluationsprimary · anthropic.com · 2026-07-30

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