Cloudflare Reveals Cross-Tenant AI Data Exposure in GLM-5.3 Model
Cloudflare AI leak involved the GLM‑5.3 model hosted on Cloudflare Workers AI , not Cloudflare's broader infrastructure. According to Cloudflare's October 26, 2026 incident report, a bug caused 155 AI responses to contain fragments of data from other customers' prompts and sessions. turn1search2 The affected model was @cf/zai-org/glm-5.3 , available through orkers AI. turn1search4 Between August 27 and September 9, 2026 , some users who submitted extremely large rompts received responses containing data from other tenants. turn1search4 Cloudflare states that only 155 responses were affected, all involving prompts larer than 681,280 tokens . turn1search7 The issue was reported by security researcher https://www.office.com/serch?q=Gadi+Evron&EntityRepresentationId=c867d1ae-a2e7-880f-bc7d-ba119ebaf4e5 of Knostic through HackerOne. turn1search4 A configuration mismatch where the model was deployed with a 1,048,576-token contet window but the underlying KV cache could...