CVE-2026-77516

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

State: Published
Severity: 5.4 Medium
Published: Sep 21, 2026
Updated: Sep 28, 2026
Reserved: Aug 20, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
MaxKB1Panel-dev	>= 2.0.0, <= 2.9.2Affected

References

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

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