CVE-2026-54149: MaxKB MCP tool import validation bypass allows post-authentication remote code execution
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/chatpipeline/step/chatstep/impl/basechatstep.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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
MaxKBto a version that resolves this vulnerability.Fixed in 2.10.0-lts
Event History
Frequently Asked Questions
What is the severity of CVE-2026-54149?
The severity of CVE-2026-54149 is rated high with a score of 8.8.
What type of vulnerability is identified in CVE-2026-54149?
CVE-2026-54149 is categorized as an OS Command Injection vulnerability.
How do I fix CVE-2026-54149?
To fix CVE-2026-54149, update your MaxKB software to version 2.10.0-lts or later.
What can be exploited in CVE-2026-54149?
CVE-2026-54149 allows for post-authentication remote code execution due to import validation bypass.
Which components are affected by CVE-2026-54149?
CVE-2026-54149 affects the tool import functionality and MCP referencing mode in MaxKB applications.