CVE-2026-77518 — MaxKB: Known MCP tool IDs expose owner Tool.code and can be referenced by attacker workflows

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
1Panel-dev / MaxKB	affected <= 2.10.2-lts

CWE

CWE-862

References

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-x65c-w438-c58f

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.