Anthropic Claude Code Source Leak
Anthropic accidentally exposed the full source code of its flagship AI coding agent, Claude Code, through a misconfigured npm package. Approximately 512,000 lines of TypeScript across 1,906 files were inadvertently published. The leak did not expose customer data or credentials but revealed the AI's architecture, unreleased features, and development roadmap.
Signal context
First seen: Mar 31, 2026
Last updated: Jun 26, 2026
Status: Public signal
Key points
- Accidental exposure of Claude Code's full source code.
- 512,000 lines of TypeScript across 1,906 files leaked via a misconfigured npm package.
- No customer data or credentials were exposed.
Signal analysis
BetaIt helps compare this signal with other published signals without treating the labels as final determinations.
Likely country: Location not provided
Watch process controls, misconfiguration and accidental disclosure paths.
- Source type: outside the affected organization
Impact area: Confidentiality
Likely asset: User or customer data
- 1 signal in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Diving into Claude Code's Source Code Leakhttps://engineerscodex.substack.com/p/diving-into-claude-codes-source-code-leakPublic source from engineerscodex.substack.com.
Claude Code — Leaked Source (2026-03-31)https://github.com/starkdcc/claude-code-original-srcPublic source from github.com.
Claude Code Source Leak: With Great Agency Comes Great Responsibilityhttps://straiker.com/claude-code-source-leak-with-great-agency-comes-great-responsibility/Public source from straiker.com.
Claude Code Leak: Critical AI Security Threat 2026 - Zscalerhttps://www.zscaler.com/blogs/security-research/anthropic-claude-code-leakPublic source from zscaler.com.
AI Code Leak Exposes the Fault Lines of Copyright - The Firewallhttps://www.thefirewall-blog.com/2026/04/ai-code-leak-exposes-the-fault-lines-of-copyright/Public source from thefirewall-blog.com.
Related signals
Grouped by why the signal is relevant.
Peter Thiel's Dialog Society Data Leak Exposes Senior US Officials
A data exposure at Dialog, a private events group co-founded by Peter Thiel, unmasked personal information and login tokens for US and allied national security figures. The incident, which Dialog internally classified as a cyberattack but evidence suggests was a website misconfiguration, exposed private details of 222 registrants for its 2026 retreat, including names, private contact details, active login tokens, and internal ratings.
Vienna Airport Targeted in APT73/Bashe Ransomware Attack
The ransomware group APT73/Bashe claimed responsibility for a cyberattack against Vienna Airport (Flughafen Wien AG) on June 23, 2026, threatening to leak sensitive data. The airport acknowledged a limited leakage of old cargo-related files from one email inbox but denied a broader system compromise.
Meta Suspends Internal AI Program After Employee Data Leak
Meta suspended its internal AI program, 'Model Capability Initiative' (MCI), after a data leak exposed sensitive employee information. The program, designed to train AI models, recorded mouse movements, clicks, keystrokes, and took screenshots of employee activity. Problems with data storage were reported in May, leading to the suspension and an ongoing investigation. The incident was publicly reported on June 23, 2026.
Whise.eu (European Real Estate CRM) Data Leak by ChimeraZ
The threat actor ChimeraZ claimed to have leaked a database from Whise, a Belgian CRM system for the real estate sector, on the dark web on June 23, 2026. The leaked data reportedly consists of 40.85 million records, approximately 15.8 GB of JSON files. Whise is a market leader in Belgium and also active in France.
McKay Sugar Cyber Incident by Gentlemen Ransomware Group
McKay Sugar, a major Australian sugar producer, suffered a cyber incident that disrupted operations at its Farley and Racecourse Mills. The Gentlemen ransomware group claimed responsibility for the attack around June 15-16, 2026, on their leak site. Public reporting indicated that McKay Sugar was working to verify what data was stolen or accessed. The ransomware group claimed to have stolen over 26 million records containing PII of customers and other internal data. The incident was discussed in public reporting around June 21, 2026.
Madison Square Garden Data Leak by ShinyHunters
The ShinyHunters group reportedly stole and leaked approximately 45 gigabytes of data from Madison Square Garden Entertainment and related entities. The leaked data is said to include corporate and customer information, as well as files referencing New York Knicks players and staff. The incident was reported on June 21, 2026.