Overview
- Anthropic, which disclosed Wednesday it is investigating a report of unauthorized use of its Claude Mythos preview, says the activity appears limited to a third-party vendor environment with no evidence of impact on its own systems.
- Multiple outlets report a small private-forum group reached the model by combining a contractor’s credentials with basic internet sleuthing to locate an access endpoint.
- The users told Bloomberg they were testing unreleased models rather than running hacking prompts, and they showed screenshots and a live demo to verify their access.
- Mozilla says early access to Mythos helped it ship Firefox 150 with protections for 271 newly identified vulnerabilities, showing how the tool can speed defensive fixes.
- Mythos is a restricted model under Project Glasswing that can find and chain software flaws across major operating systems and browsers, and the episode is likely to drive stricter vendor audits and tighter access controls for such dual‑use AI.