{"id":"CVE-2026-77518","published":"2026-09-21T21:17:10.477","lastModified":"2026-09-21T21:17:10.597","description":"MaxKB is an open-source AI assistant for enterprise. In 2.10.2-lts and earlier, a normal workspace user who knows another user's active MCP tool_id in the same workspace can retrieve the hidden tool through the tool-detail route because it does not apply the per-resource authorization used by the list route. The response includes Tool.code, which may contain MCP server configuration and headers, and an attacker who can create or edit an attacker-owned workflow can place the same foreign mcp_tool_id in a workflow mcp-node so workflow debug uses the owner's MCP configuration without verifying permission to use that tool. No fixed version is available as of this review.","cvssScore":5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","cwes":["CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-x65c-w438-c58f","tags":[]}],"exploitRefs":[{"url":"https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-x65c-w438-c58f","tags":[]}],"hasPoc":true,"ai":{"summary":"An authorization bypass flaw allows a normal user to retrieve hidden tools by knowing another user's active MCP tool_id. This can expose sensitive configuration data.","exploitability":"Exploitation requires knowledge of another user’s MCP tool_id and access to the same workspace; moderately difficult.","blast_radius":"If exploited, it could lead to unauthorized access to sensitive configurations and headers, impacting multiple users within the same workspace.","remediation":"Implement strict per-resource authorization checks for all API routes handling MCP tools.","tags":["auth-bypass","api","configuration-exposure","workspace"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:30:12.792Z"}}