InfoSecBulletin Cybersecurity for mankind
Anthropic’s special Claude Code CLI tool had its complete TypeScript source code inadvertently exposed due to a misconfiguration in npm package. A security researcher found a leaked .map file that pointed to the clear code stored on Anthropic’s own cloud.
German police read Signal, Telegram, WhatsApp messages without breaking encryption
Urgent Patch! cPanel, GitLab Flaws Expose Users to RCE, File and Credential Theft
Palo Alto PAN-OS Flaw Enables Root Arbitrary Code Execution
Critical Check Point VPN flaws allow remote code execution attacks
Cisco confirms CVE-2026-20079 flaw in Secure FMC is exploited in attacks
Hackers exploit PaperCut flaws using hundreds of AI agents, compromising 440 servers globally
CISA Says Chinese Firms Extracted Billions of Tokens From Frontier AI Models
Nightmare Eclipse Drops New Microsoft Defender ‘ShieldCrash’ zero-day
cPanel Flaw Lets Hosting Accounts With Mail Privileges Execute Code as Root
FortiSandbox, FortiOS, FortiProxy ZTNA flaws unveil, while Fortigate firewall actively exploited
Security researcher posted on x saying that
“Claude Code source code has been leaked via a map file in their npm registry!”.
The post quickly got people in the AI community talking. It got almost 10 million views and 1,500 comments.
It seems that Anthropic hurried to take down the npm package. But it was too late. Many GitHub users had already shared copies of the project.
The .map files are often used by developers to fix software programs. These plain text files work like a small map of the original code, helping developers find where the errors happen. But .map files usually don’t have the complete source code.
