CVE-2026-77518 (GCVE-0-2026-77518)

Vulnerability from cvelistv5 – Published: 2026-09-21 20:36 – Updated: 2026-09-22 13:19
VLAI
Title
MaxKB: Known MCP tool IDs expose owner Tool.code and can be referenced by attacker workflows
Summary
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.
Severity
5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:18 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
1Panel-dev MaxKB Affected: <= 2.10.2-lts
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