Cloudflare: KV cache bug in GLM-5.3 exposed other customers' data
Cloudflare disclosed a tenant isolation issue in the GLM-5.3 model it hosts on Workers AI, active between August 27 and September 9, 2026. A total of 155 responses were affected, all tied to prompts longer than 681,280 tokens. The company says it has remediated the bug and found no evidence of deliberate exploitation.
