ISLAMABAD: Anthropic has confirmed that part of the internal source code for its AI coding assistant, Claude Code, was accidentally made public due to what it described as a “human error”.
The issue occurred when an internal file was mistakenly included in a software update, providing access to an archive containing nearly 2,000 files and around 500,000 lines of code. The material was subsequently uploaded to the developer platform GitHub.
An Anthropic spokesperson clarified that no sensitive customer information or login credentials were exposed in the incident.
Claude Code
“Earlier today, a Claude Code release included some internal source code. No sensitive customer data or credentials were involved or exposed,” the spokesperson said.
“This was a release packaging issue caused by human error, not a security breach.”
The leak quickly gained attention online, with a post sharing the GitHub link attracting more than 29 million views within a short period.
The exposed material mainly relates to the internal structure of the Claude Code tool and does not include confidential data linked to Anthropic’s core AI model.
Parts of the tool’s code had already been examined previously by independent developers, who had reverse-engineered earlier versions. In fact, a previous iteration of Claude Code had also seen portions of its source code exposed in February 2025.
