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LLMs consistently generate vulnerable TOCTOU race conditions in credit-gated AI APIs, allowing users to bypass balance checks through concurrent requests—a pattern that appears in 100% of tested code generation attempts but is correctly identified 98% of the time during security audits. The vulnerability exploits the time gap between balance verification and API call completion, enabling attackers to perform denial-of-wallet attacks with minimal sophistication.

GPT-5.4 GPT-5-Codex Claude Opus 4.6 Claude Sonnet 4.6 Gemini 3 Pro Gemini 3 Flash Grok Code Fast 1 Mistral AI Devstral DeepSeek R1 Llama 4 Maverick OpenAI Anthropic Google Tyler Batten
forward.deployed.agency · grandSpecial · 4 days ago · details · hn