Amazon researchers used Anthropic AI to find cybersecurity weaknesses
Amazon researchers used Anthropic AI to find cybersecurity weaknesses
Publish Date: 2026-06-13 13:38:00
Source Domain: www.washingtonexaminer.com
Using an unordered list, summarize the following article with between 4 and 8 key points. Anthropic said it has blocked public access to its flagship Fable 5 and Mythos 5 models, rolled out earlier this week, after the Commerce Department barred their use by foreign nationals and users outside the United States.Katie Moussouris, chief executive of cybersecurity firm Luta Security, said the jailbreak research was conducted by Amazon researchers who used a series of prompts to persuade Anthropic’s model to disclose information about several security vulnerabilities, according to the Wall Street Journal. Moussouris said Anthropic shared a copy of the report with her. She argued the information revealed by the model would be more useful to cybersecurity professionals defending networks than to malicious actors seeking to exploit them.
“Who at the White House evaluated this and thought it was a threat?” Moussouris said. “It’s a complete overreaction because this is exactly the kind of prompting that defenders would do.”
Amazon did not confirm that it performed jailbreak testing on Anthropic’s AI models, but did acknowledge that the company regularly consults the government on cybersecurity issues.
“As a leading cloud provider that serves a large number of private and public sector customers, it’s not uncommon for governments to seek our counsel on potential security risks,” an Amazon spokesman told the Washington Examiner. “When they occur, we don’t share the details of these discussions.”
Commerce Secretary Howard Lutnick notified Anthropic CEO Dario Amodei on Friday that Fable 5 and Mythos 5 would be subject to export controls, according to an administration official. The restrictions prohibit access by customers outside the United States, along with foreign nationals within the country.
Anthropic said it believes the government’s decision was tied to a recently identified jailbreak technique, allowing users to bypass safety guardrails in the models. The company described the method as one that uncovered only a small number of previously known and relatively minor vulnerabilities in cybersecurity software.
“We reviewed a demonstration of this specific technique being used to identify a small number of previously known, minor vulnerabilities,” Anthropic said in a statement. “These vulnerabilities all appear relatively simple, and we have found that other publicly available models are able to discover them as well without requiring a bypass.”
The Washington Examiner reached out to Anthropic and the Commerce Department for comment.
Anthropic blocks most advanced AI models after US bars foreign use
Anthropic said it is complying with the government’s directive but strongly disagrees with the rationale behind the order.
“We are complying with the government’s legal directive and are removing access to Fable 5 and Mythos 5 for all users,” the company said. “However, we disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people.”
