Cloudflare's GLM 5.3 leaked other users' data into 155 replies through a cache bug
For almost two weeks, very long prompts sent to the GLM 5.3 model on Cloudflare Workers AI could come back with pieces of other customers' requests. Cloudflare says 155 responses were affected. The cause was a mismatch between the model's context window and its GPU cache, plus a bug in the open source inference engine SGLang.