CVE-2026-54149: 1Panel-dev MaxKB command injection in MCP tool import

CVE-2026-54149 · Severity: high · CVSS 8.8 · Published 2026-07-10

MaxKB, an open-source AI assistant platform, contains a security flaw that allows authenticated users to execute unauthorized commands on the underlying server. By importing a specially crafted tool file, an attacker can bypass security checks and force the system to run malicious code. This could lead to a complete takeover of the server, theft of sensitive data, or disruption of business operations.

Technologies: 1Panel-dev MaxKB. Vendors: 1Panel-dev.

Quick answers

Is CVE-2026-54149 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-54149 being exploited in the wild.
How severe is CVE-2026-54149?
High severity, with a CVSS score of 8.8, published 10 July 2026.
Which products and versions are affected?
1Panel-dev MaxKB < 2.10.0-lts.
Is there a fix for CVE-2026-54149?
A patch was published on 2026-06-04: Version 2.10.0-lts released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-54149 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-54149?
Check whether you run 1Panel-dev MaxKB at an affected version. 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.

Technical details

A command injection vulnerability exists in MaxKB due to improper validation of Model Context Protocol (MCP) transport types during tool importation and chat pipeline execution. While MaxKB is designed to only support 'sse' and 'streamable_http' transports, the 'Import.import_' function in 'apps/tools/serializers/tool.py' and the referencing mode in 'base_chat_step.py' fail to call 'validate_mcp_transport'. An authenticated attacker can import a .tool file containing a 'stdio' transport configuration with arbitrary system commands. When this tool is triggered via an AI Chat node, the 'MultiServerMCPClient' processes the configuration and executes the commands via 'subprocess.Popen'. This issue is resolved in version 2.10.0-lts.

Affected products

  • 1Panel-dev MaxKB < 2.10.0-lts

Timeline

  • 2026-05-30: disclosed: Vulnerability discovered
  • 2026-06-04: patched: Version 2.10.0-lts released
  • 2026-06-22: advisory: GitHub Security Advisory published
  • 2026-07-10: advisory: NVD published CVE-2026-54149

References

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