Making frontier cybersecurity capabilities available to defenders

kept by eddie feb 23

Anthropic launches Claude Code Security, an AI-powered static analysis tool that reads and reasons about code to detect complex vulnerabilities and suggest patches.

Claude Opus 4.6: System Card Part 1: Mundane Alignment + MW
Claude Opus 4.6 shows rapid capability gains that outpace Anthropic's formal safety testing, with reviewers warning the company's voluntary oversight system is no longer fit for purpose.
also on Claude Opus 4.6, #security, Anthropic, #open-source, #developer-tools
Behind the Scenes Hardening Firefox with Claude Mythos Preview - Mozilla Hacks - the Web developer blog
Mozilla details how agentic AI harnesses using Claude Mythos Preview found 271 real Firefox security bugs by dynamically creating reproducible test cases and dismissing false positives.
also on Claude Opus 4.6, #security, Anthropic, #developer-tools
Scientists Find Way to Supercharge Dangerous Computer ‘Worms’ With A.I.
University of Toronto researchers built an AI-powered worm that autonomously spreads by tailoring exploits to each machine's known vulnerabilities.
also on #cybersecurity, #security, Anthropic, #open-source
Anthropic’s Mythos Found Bugs in Apple’s MacOS - WSJ
Security researchers at Calif used techniques from testing Anthropic's Mythos AI to find a privilege escalation exploit in Apple's macOS, bypassing its advanced security.
also on #cybersecurity, #security, Anthropic