CVE-2026-39417: falha de média gravidade em 1Panel-dev MaxKB
MaxKB: RCE via MCP stdio command injection in workflow engine
Publicada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 4.6epss 0.2%
MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an incomplete fix for CVE-2025-53928, where a Remote Code Execution vulnerability still exists in the MCP node of the workflow engine. MaxKB only restricts the referencing code path (loading MCP config from the database). The else branch, responsible for loading mcp_servers directly from user-supplied JSON remains completely unpatched. Since mcp_source is an optional field (required=False), an attacker can simply omit it or set it to any non-referencing value to bypass the fix. By calling the workflow creation API directly with a crafted JSON payload, an attacker can inject a complete MCP node configuration with stdio transport, arbitrary command, and args — achieving RCE when the workflow is triggered via chat. This issue has been fixed in version 2.8.0.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Produtos afetados
1Panel-dev · MaxKBCVEs relacionadas — 1Panel-dev MaxKB
No mesmo produto, das mais perigosas para as menos.
CVE-2026-6108MEDIUM1Panel-dev MaxKB Model Context Protocol Node base_mcp_node.py execute os command injectionEPSS 1.5%CVE-2026-77521CRITICALMaxKB: Prompt-injectable agent can lead to command executionEPSS 1.0%CVE-2024-56137MEDIUMMaxKB RCE vulnerability in function libraryEPSS 0.8%CVE-2025-4546MEDIUM1Panel-dev MaxKB Knowledge Base Module csv injectionEPSS 0.7%CVE-2025-53928MEDIUMMaxKB has RCE in MCP callEPSS 0.5%CVE-2026-54149HIGHMaxKB MCP tool import validation bypass allows post-authentication remote code executionEPSS 0.5%