Cloudflare Discloses Tenant Isolation Failure in GLM-5.3 Model Affecting 155 Requests

Cloudflare disclosed on October 26 that its GLM-5.3 Workers AI model exposed customer data across user sessions for 155 responses between August 27 and September 9, 2026, caused by a configuration mismatch and an SGLang inference engine bug. The leak affected only long-context requests exceeding 681,280 tokens, the capacity limit of the key-value cache pool on Cloudflare's GPU clusters.