The Fable 5 Export Controls Harm US Cyber Defense
English summary
Anthropic's Claude Fable 5 model was banned under US export controls after researchers demonstrated it could write exploit scripts when asked to "fix this code" on code with known and planted vulnerabilities. Regulators considered this a jailbreak, but security expert Kate Moussouris confirmed the prompts were defensive requests for code review, patching, and test scripting. The model initially refused a direct security review but complied with the fix workflow, which is the most valuable AI capability for defensive security: executing the find, fix, and test loop. The ban eliminates a key tool for defenders and stems from non-technical decision-makers misinterpreting legitimate defensive use as offensive capability.
Chinese summary
Anthropic的Claude Fable 5模型因研究人员在包含已知和人为植入漏洞的代码上使用“修复此代码”提示，并展示其可生成漏洞利用脚本，而被美国出口管制禁止。监管者将此视为越狱，但安全专家Kate Moussouris确认这些提示是防御性的代码审查、修补和测试脚本需求。模型最初拒绝了直接的安全审查，但接受了修复工作流，这正是AI对防御性安全最有价值的贡献：执行发现、修复和测试循环。该禁令剥夺了防御者的关键工具，源于非技术决策者将合法的防御性使用误解为攻击能力。
Key points
Fable 5 was banned under export controls because a defensive prompt to fix security bugs was misinterpreted as a jailbreak.
Fable 5因防御性的安全漏洞修复提示被误认为越狱而遭出口管制禁令。
The prompts were legitimate find-fix-test requests that are essential for cyber defense and cannot be removed without degrading the model.
这些提示是合法的发现-修复-测试请求，对网络防御至关重要，且无法在不降低模型性能的情况下去除。
Non-technical regulators failed to distinguish between offensive exploit writing and defensive patching, harming US cyber defense capabilities.
非技术监管者未能区分攻击性漏洞利用编写与防御性修补，损害了美国的网络防御能力。