CVE-2026-6118 PoC — AstrBotDevs AstrBot MCP Endpoint tools.py add_mcp_server command injection

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-6118.yaml

Associated Vulnerability

Title: AstrBotDevs AstrBot MCP Endpoint tools.py add_mcp_server command injection (CVE-2026-6118)
Description:A vulnerability was determined in AstrBotDevs AstrBot up to 4.22.1. Impacted is the function add_mcp_server of the file astrbot/dashboard/routes/tools.py of the component MCP Endpoint. This manipulation of the argument command causes command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Description

AstrBot versions up to and including 4.22.1 contain a command injection vulnerability in the MCP server configuration endpoint. The /api/tools/mcp/add endpoint accepts arbitrary command and args fields that are passed directly to subprocess execution during the connection test, without any validation or allowlist enforcement. An attacker with dashboard access can execute arbitrary system commands with AstrBot process privileges.

File Snapshot

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