Anthropic confirms its internal system was accessed: customer conversations, model weights were not affected

Anthropic's partial sales, human resources, and IT systems were accessed; customer and Claude conversations, model responses, source code, and model weights were not affected. Researchers found a path into Anthropic's internal system through a third-party commercial software vulnerability in less than 12 hours. Anthropic has disabled the affected third-party software and closed off researchers' access.