PT-2026-32564 · 1Panel Dev · Maxkb

Jackieya · Published 2026-04-14 · Updated 2026-04-14 · CVE-2026-39417

Mitre

CVSS v3.1

4.6

Medium

AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

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.

Fix

RCE

OS Command Injection

Weakness Enumeration

CWE-78

CWE-20

Related Identifiers

CVE-2026-39417

Affected Products

Maxkb

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-39417 · Security Note
• https://github.com/1Panel-dev/MaxKB/commit/50e96002ee5dca34c68d3d9333b64ea358c92304 · Note
• https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-pw52-326g-r5xj · Note
• https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0 · Note
• https://twitter.com/CVEnew/status/2043976172510331339 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2044013742162157950 · Twitter Post
• https://twitter.com/CVEarity/status/2044067729783828870 · Twitter Post