Missing Authentication for Critical Function Affecting @arikusi/deepseek-mcp-server package, versions >=1.4.2 <1.8.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published12 Jul 2026
- disclosed10 Jul 2026
- creditUnknown
Introduced: 10 Jul 2026
NewCVE-2026-55605 (opens in a new tab)How to fix?
Upgrade @arikusi/deepseek-mcp-server to version 1.8.0 or higher.
Overview
@arikusi/deepseek-mcp-server is a MCP Server for DeepSeek API integration - enables Claude Code to use DeepSeek Chat and Reasoner models
Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the POST /mcp endpoint due to the absence of authentication checks in the createMcpExpressApp process. An attacker can gain unauthorized access to initialize sessions, enumerate available tools, and invoke local functionalities by sending unauthenticated requests to the exposed endpoint. This is only exploitable if the application is deployed in self-hosted HTTP mode with network exposure and without additional access controls.