Critical RCE Flaw in radare2-mcp: Command Injection via JSON-RPC
The National Vulnerability Database has disclosed CVE-2026-6942, a critical OS command injection vulnerability affecting radare2-mcp versions 1.6.0 and earlier. Attackers can exploit this flaw by injecting shell metacharacters through the JSON-RPC interface. This bypasses existing command filters, enabling remote attackers to execute arbitrary commands on the host system without any authentication.
The vulnerability carries a CVSS score of 9.8 (CRITICAL), highlighting its severe impact. Exploitation is straightforward due to the lack of authentication and the direct nature of command injection. This means an unauthenticated attacker could gain full control over a system running a vulnerable instance of radare2-mcp.
What This Means For You
- If your organization uses radare2-mcp, immediately verify if your version is 1.6.0 or earlier. If so, patch to the latest version or isolate the affected system from untrusted networks. Audit network traffic to the JSON-RPC interface for any suspicious commands containing shell metacharacters.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-6942 - radare2-mcp JSON-RPC Command Injection
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6942 | Command Injection | radare2-mcp version 1.6.0 and earlier |
| CVE-2026-6942 | RCE | os command injection vulnerability in r2_cmd_str() |
| CVE-2026-6942 | Command Injection | Bypassing command filter through shell metacharacters in user-controlled input |
| CVE-2026-6942 | RCE | Injection through jsonrpc interface parameters |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 24, 2026 at 00:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
Believe this infringes your rights? Submit a takedown request.
Related Posts
OpenShell Mirror Mode Allows Arbitrary Code Execution
CVE-2026-41355 — OpenShell before 2026.3.28 contains an arbitrary code execution vulnerability in mirror mode that converts untrusted sandbox files into workspace hooks. Attackers with mirror...
OpenClaw: High-Severity Access Control Bypass Looms
CVE-2026-41353 — OpenClaw before 2026.3.22 contains an access control bypass vulnerability in the allowProfiles feature that allows attackers to circumvent profile restrictions through persistent profile...
OpenClaw RCE: Paired Nodes Bypass Auth, Allow Arbitrary Commands
CVE-2026-41352 — OpenClaw before 2026.3.31 contains a remote code execution vulnerability where a device-paired node can bypass the node scope gate authentication mechanism. Attackers with...