Anthropic’s Claude Code Security Triggers Cybersecurity Stock Selloff
-

Shares of major cybersecurity firms slid sharply after Anthropic launched Claude Code Security, an AI-powered vulnerability scanner, on Feb. 20. Introduced as a limited research preview, the tool claims to scan entire codebases, validate findings to reduce false positives, and propose patches for developer approval — reasoning through software “like a skilled security researcher.”
Anthropic says its most advanced model, Claude Opus 4.6, has already identified more than 500 high-severity vulnerabilities that had gone undetected for years. The launch came just one day after OpenAI introduced a new benchmark for evaluating how AI systems detect and patch smart contract vulnerabilities — where Claude Opus 4.6 reportedly ranked first. The timing intensified investor concerns that AI-native tools could disrupt traditional cybersecurity services.
-
500 high severity bugs found and my code suddenly feels very seen