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Cybersecurity watch

Cross-request KV cache exposure in the GLM-5.3 Workers AI model, and our remediation with SGLang

Cloudflare Security

Why it matters

This page references a cybersecurity signal published by Cloudflare Security. It helps CISOs, DPOs, IT leaders, infrastructure teams, SMBs and enterprise accounts track vulnerabilities, alerts and trends that may affect security, compliance or system resilience.

Unix Consulting read

This signal relates to AI usage, assistants, models or data handled by these systems. It should be read through a governance lens: which data enters the tool, which access is granted and which traces remain auditable.

Watch points

  • Sensitive data sent to AI tools
  • Connectors, permissions and access logs
  • Internal rules for assistants, agents and local LLMs

Recommended action

Review handled data, connectors and available logs before authorizing or expanding the AI usage concerned.

Relevant for

DPOs, CISOs, IT leaders, innovation teams, exposed business units and AI compliance owners.

Source summary

A configuration mismatch in GLM 5.3 on Workers AI triggered an SGLang bug that exposed KV cache pages across requests. Here is how we addressed the issue.

Read the source