Analysis: Anthropic refused to patch the Fable jailbreak vulnerability, prompting the US government to impose export controls.

According to Mars Finance, David Sacks, the White House's head of AI and Encryption, stated that while Anthropic's commercial version of the Mythos series, Fable, released this week, includes a security barrier, bypassing this barrier would expose users to Mythos' advanced cyberattack capabilities. Sacks pointed out that Anthropic has consistently described Mythos as a "cyber weapon" requiring regulation, therefore fixing the vulnerabilities should be their responsibility. Sacks claims that a partner trusted by both Anthropic and the US government discovered a jailbreak method to bypass the security barrier while testing Fable. The US government subsequently demanded that Anthropic CEO Dario Amodei fix the vulnerability or remove the model from service, but this was refused. Anthropic stated that the vulnerability was "not serious," a claim inconsistent with the assessments of the US government and its partners. Sacks stated that Anthropic has always emphasized that security should be a top priority, but in this instance, they prioritized maintaining the consumer-grade model service. In response, the U.S. government reluctantly imposed export controls on Anthropic, hoping that Anthropic would resolve the security issues as soon as possible in order to lift the restrictions and restore the full release of Fable. Sacks also denied that this action was related to the previous dispute between the U.S. Department of Defense and Anthropic, stating that the government acknowledges Anthropic's technical capabilities and believes the current issue can be easily resolved, with the initiative currently in Anthropic's hands.