Cybersecurity Enters New Era as AI Unleashes Vulnerability Storm

https://newsonjapan.com/article/149427.php

Publish Date: 2026-05-29 11:17:00

May 29, 2026 (News On Japan) –
Anthropic’s newly developed AI system, Claude Mythos, is forcing companies to rethink cybersecurity as it dramatically accelerates the discovery of software vulnerabilities while simultaneously raising concerns about how attackers could exploit the technology.

Yukihiro Katsumura, an editorial writer at Nikkei Cross Tech, said the emergence of Mythos marks a turning point in cyber defense. While the AI is highly effective at identifying software vulnerabilities—security weaknesses that can be exploited by hackers—it can also be used to generate attack programs capable of exploiting those flaws.

In one simulation involving the Firefox web browser, Mythos reportedly identified vulnerabilities in 72.4% of 250 test cases and successfully generated code capable of carrying out cyberattacks. The AI has also uncovered vulnerabilities that had remained undetected for 27 years and identified issues that conventional testing methods failed to find even after millions of attempts.

Because of the potential risks, Mythos has been made available to only about 50 organizations. However, when those companies used the AI to analyze their own software, they collectively discovered more than 10,000 vulnerabilities.

Unlike traditional security tools, Mythos analyzes open-source software (OSS), whose source code is publicly available and widely used across the internet. The AI can rapidly examine programs containing tens of thousands of lines of code, identifying subtle weaknesses that even experienced developers may overlook. By understanding the meaning and structure of code in a way that resembles human reasoning, the system can detect flaws with remarkable speed.

During the past two months alone, Mythos reportedly analyzed more than 1,000 software projects and identified approximately 6,200 high-risk vulnerabilities. Although Anthropic has notified affected organizations…

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