Another Anthropic model gained access to the open internet during testing, company says

September 9, 2026 / 8:19 PM EDT / CBS News

Anthropic disclosed on Wednesday that another one of its Claude models mistakenly gained access to the open internet during a cybersecurity exercise, marking the fourth time its models have done so.

An early version of the Claude Opus 4.6 model connected to the internet, hacked into a third-party system and gained access to someone's personal information this past January, the company said in its assessment.

As in the previous three incidents, which were disclosed in July, Claude was told it was operating in a simulation without internet access, but due to a misconfiguration, the environment actually left internet access open.

Similar to the three previous incidents, Claude was assigned a fictional scenario as part of a cybersecurity challenge known as CTF, "Capture The Flag." The model was given a target machine and tasked with retrieving a piece of secret information — the flag — from it.

But Claude accidentally made its target unreachable, rendering the task impossible to solve, Anthropic said. Once realizing it couldn't reach its target, it tried to quit. Despite trying eight separate times, it wasn't able to quit due to a misconfiguration issue.

Since Claude was…

Original source: https://www.cbsnews.com/moneywatch/