CVE-2026-54149 MaxKB MCP tool import validation bypass allows post-authentication remote code execution
Authenticated users can achieve remote code execution by importing malicious MCP tool files with stdio transport in MaxKB.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54149?
CVE-2026-54149 is a high-severity command injection vulnerability in 1Panel-dev MaxKB, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
MaxKB is an open-source AI assistant for enterprise. Prior to 2.10.0-lts, MaxKB tool import functionality in apps/tools/serializers/tool.py and MCP referencing mode in apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py do not consistently validate MCP transport type, allowing an authenticated user to import a .tool file containing stdio transport with malicious commands and trigger the configuration through an AI Chat node so MultiServerMCPClient executes arbitrary system commands. This issue is fixed in version 2.10.0-lts.
Weakness: CWE-78
Which versions are affected by CVE-2026-54149?
How do I fix CVE-2026-54149?
No fix has been published for CVE-2026-54149 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-54149 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54149 exists.
Sources
Also known as GHSA-4pr3-9xhm-98x5.