---
title: "Claude flagged 493 security issues across 25 open-source projects, covering 5M+ lines of C, C++, Java, PHP, and Python code; one went unnoticed for 21 years (Chris Rohlf/Anthropic)"
type: signal
url: https://frontiernewswire.com/s/claude-flagged-493-security-issues-across-25-open-source-projects-97a21618
published: 2026-10-21T14:15:01.000Z
byline: "Source: TECHMEME"
---

# Claude flagged 493 security issues across 25 open-source projects, covering 5M+ lines of C, C++, Java, PHP, and Python code; one went unnoticed for 21 years (Chris Rohlf/Anthropic)

Source: TECHMEME · Published 2026-10-21 · Canonical: https://frontiernewswire.com/s/claude-flagged-493-security-issues-across-25-open-source-projects-97a21618

Chris Rohlf / Anthropic : Claude flagged 493 security issues across 25 open-source projects, covering 5M+ lines of C, C++, Java, PHP, and Python code; one went unnoticed for 21 years — Over the past year, we've published lots of data that shows that frontier AI models are more than capable of discovering and exploiting security vulnerabilities.

## Sources

- [Read the original at TECHMEME](https://www.techmeme.com/261021/p31#a261021p31)

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