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Why Durable Objects Still Run Old Code for 5 Minutes After Deploy

From 2026-10-30, Cloudflare Durable Objects use deferred code updates by default: an active object can keep running its current code for up to 300 seconds (5 minutes) while waiting to hibernate. immediate fits when a reset is better than waiting. deferred is best effort—it does not guarantee every in-flight operation finishes or that the full max_delay runs. We haven't tested every Worker/Durable Object deploy path. For reference only.

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Cloudflare Fixed Cross-Request KV Cache Exposure in Workers AI GLM-5.3

Cloudflare’s blog says cross-request KV cache exposure hit only Workers AI @cf/zai-org/glm-5.3 from August 27–September 9, 2026. In that window, 155 responses to prompts longer than 681,280 tokens mixed in other customers’ data; Cloudflare found no deliberate-exploitation evidence after excluding its tests and the researcher’s. The model went offline within 40 minutes of the September 9 incident declaration and was restored the same day after config and engine fixes. Coordinated disclosure with SGLang advises operators to upgrade to SGLang v0.5.22+. As of October 27, 2026 (Beijing time).

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