Unauthorized Access Reported on Anthropic's Enterprise Cybersecurity Tool Mythos

Wed, 22 Apr 2026 02:54:00 +0200

Anthropic's recently announced cybersecurity tool, Mythos, designed for enterprise security, may have been accessed by an unauthorized group. According to Bloomberg, members of a private online forum managed to gain access to Mythos through a third-party vendor. The group reportedly includes individuals from a Discord channel focused on exploring unreleased AI models. Anthropic confirmed the investigation into the breach but stated that there is currently no evidence of any impact on its own systems. The group demonstrated their access to Bloomberg with screenshots and a live demonstration. They reportedly gained entry on the same day Mythos was publicly announced, making educated guesses based on Anthropic's previous model formats. The company released Mythos to select vendors, including Apple, under Project Glasswing, intending to limit exposure to potential malicious use. While the group claims their interest is primarily exploratory rather than harmful, the incident highlights pote