Auth bypass in 1panel-Dev Maxkb
CVE-2026-77516
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- 1panel-dev Maxkb — versions >= 2.0.0, <= 2.9.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-77516?
- CVE-2026-77516 is a medium-severity vulnerability in 1panel-Dev Maxkb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-09-21.
- How severe is CVE-2026-77516?
- Medium severity. CVSS v3 base score is 5.4 out of 10.