CVE-2026-77516

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

Published 21 Sep 2026 • Updated 21 Sep 2026

Severity: MEDIUM

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 (1)

• 1Panel-dev MaxKB

Problem types

• CWE-639: Authorization Bypass Through User-Controlled Key
• CWE-862: Missing Authorization

References (1)

• https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-383v-fx78-pphm