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OpenAdvisories
Medium · 5.4 CVE-2026-77516 EUVD-2026-84157

MaxKB: Missing per-tool authorization in the agent and workflow tool-dispatch path

Published Sep 21, 2026 · Updated Sep 28, 2026 · Assigned by GitHub_M

Description

MaxKB is an open-source AI assistant for enterprise. From version 2.0.0 through 2.9.2, a lowest-role workspace member denied access to a tool by WorkspaceUserResourcePermission can still bind its identifier through tool_ids, skill_tool_ids, or mcp_tool_ids and execute it through the agent or workflow dispatch path. The dispatch path does not reapply the per-tool grant enforced by dedicated tool routes, and tool execution decrypts server-side init_params, allowing the caller to receive credentials carried by the denied tool. No fixed version is available as of this review.

Affected products

VendorProductAffectedFixed
1Panel-dev MaxKB >= 2.0.0, <= 2.9.2 —

References