# CVE-2026-39417: MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an incomplete fix for , where a Remote C

Source: https://junglewise.ai/threats/cve-2026-39417-maxkb-is-an-open-source-ai-assistant-for-enterprise-versions-2-7  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-14  
License: CC BY 4.0 with a link back

CVE-2026-39417 · Severity: medium · CVSS 4.6 · Published 2026-04-14

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.

Technologies: [Maxkb](https://junglewise.ai/threats/technologies/maxkb-maxkb). Vendors: [Maxkb](https://junglewise.ai/threats/vendors/maxkb).

## Quick answers

**Is CVE-2026-39417 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39417 being exploited in the wild.

**How severe is CVE-2026-39417?** Medium severity, with a CVSS score of 4.6, published 14 April 2026.

**Which products and versions are affected?** Maxkb. The advisory does not name versions.

**Is there a fix for CVE-2026-39417?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-39417?** Check whether you run Maxkb. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Maxkb

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