CVE-2026-59726 PoC — Ruflo: Unauthenticated RCE in MCP bridge default docker-compose deployment

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-59726.yaml

Associated Vulnerability

Title: Ruflo: Unauthenticated RCE in MCP bridge default docker-compose deployment (CVE-2026-59726)
Description:Ruflo is an agent meta-harness for Claude Code and Codex. Prior to 3.16.3, ruflo's default docker-compose deployment exposed the MCP bridge POST /mcp and POST /mcp/:group endpoints without authentication, allowing an unauthenticated network attacker to invoke tools/call to terminal_execute, obtain a shell in the bridge container, read provider API keys, and poison AgentDB learning-store patterns. This issue is fixed in version 3.16.3.

Description

ruflo MCP bridge (< 3.16.3) in its default docker-compose deployment exposes POST /mcp with no authentication and binds to all interfaces (0.0.0.0:3001). The executeTool() function has no server-side deny list for dangerous tools, allowing an unauthenticated attacker to invoke tools/call with ruflo__terminal_execute, which runs execSync(command) on attacker-supplied input. This yields arbitrary command execution as the node user (uid 1000) inside the bridge container. The blocklist (AUTOPILOT_BLOCKED_PATTERNS + isBlockedTool()) is enforced only in the autopilot SSE handler; POST /mcp and POST /mcp/:group bypass it entirely.

File Snapshot

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