# Cathedral claims AI agents breached Anthropic systems in under 12 hours

_Published Monday, October 26, 2026 at 9:02 AM EDT · Security, AI · Latest · Tier 2 — Notable_

Cybersecurity startup Cathedral says its researchers breached Anthropic's internal systems in under 12 hours using AI agents, the Washington Post reported. The months-old firm, founded by former DOGE staffers, told the Claude maker that researchers had penetrated sensitive systems in a report reviewed by the newspaper.

## Sources

- [Techmeme](https://www.techmeme.com/261026/p16#a261026p16)

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Canonical: https://techandbusiness.org/newswire/4ffdgPY09cPGfO6y_Mtqk7
Published: 2026-10-26T13:02:06.644Z
Story chronology: 2026-10-26T11:35:03.000Z
Retrieved: 2026-10-26T15:59:03.265Z
Publisher: Tech & Business (techandbusiness.org)