Saturday, April 25, 2026

Claude finds a 27-year-old bug - Arturo Ferreira & Liam Lawson, The AI Report

The initiative is built around Claude Mythos Preview, an unreleased frontier model that has already found thousands of high-severity zero-day vulnerabilities, including some in every major operating system and web browser. Mythos Preview identified a 27-year-old vulnerability in OpenBSD, a 16-year-old flaw in FFmpeg, and autonomously chained together multiple Linux kernel vulnerabilities to gain full system control. Anthropic is committing $100M in usage credits for defensive security work across partners and additional organizations, plus $4M in donations to open-source security organizations like the Linux Foundation.

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