Cloudflare has identified a cross-request KV cache exposure issue in the GLM-5.3 Workers AI model, which affected 155 responses to prompts longer than 681,280 tokens. The issue was caused by a misconfiguration of the SGLang inference engine, which resulted in the model generating responses that contained data from other customers' requests. The bug was patched, and the model has been restored with a corrected configuration and patched inference engine. AI summary
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A configuration mismatch in GLM 5.3 on Workers AI triggered an SGLang bug that exposed KV cache pages across requests. Here is how we addressed the issue.