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Anthropic has launched a limited research preview of Claude Code Security, a new tool that scans software for vulnerabilities and recommends fixes, marking a significant step in the use of artificial intelligence for cyber defense and sending shockwaves through the cybersecurity industry. The tool, built into Anthropic’s Claude Code platform, is now available to Enterprise and Team customers, with free accelerated access offered to open-source project maintainers. It comes as the San Francisco-based AI company says it expects AI to scan a significant share of the world’s code in the near future. The existing security tools only work through the common problem patterns, like exposed passwords or outdated encryption. Claude Code Security is supposed to go further than pattern-matching. It works through a full codebase the way a human researcher would, following the path data takes across a system and catching problems that standard scanners overlook. Results go through several rounds of checks before a developer ever sees them, cutting down on dead ends. Each issue is also ranked by how serious it is, so teams know where to start. It runs on Claude Opus 4.6, Anthropic’s newest model, which the company’s own Frontier Red Team has been putting through its paces. That testing turned up more than 500 vulnerabilities sitting in live open-source codebases — some of them had been there for decades without anyone catching them, even after years of expert review. Anthropic says it is now going through the process of notifying the people responsible for those projects. The company has also been running Claude across its own internal code and says the results have been strong. Analysts push back, but markets aren’t convinced The news shook cybersecurity investors. CrowdStrike shares dropped 6.8% on Friday and Okta fell 9.2%, as markets began questioning whether AI tools could eat…

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Filed under: News - @ February 21, 2026 5:26 pm