Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2026-6942 |
| Alert Source | GitHub Advisory - Critical Vulnerability |
| CVE Publication Year | 2026 |
| Date Published | 2026-04-23 |
| Vendor | radareorg |
| Product | radare2-mcp |
| CVSS Score | 9.8 (critical) |
| EPSS Score | No data |
| CISA KEV | No |
| Ransomware | Not confirmed |
Vulnerability Description
radare2-mcp version 1.6.0 and earlier contains an os command injection vulnerability that allows remote attackers to execute arbitrary commands by bypassing the command filter through shell metacharacters in user-controlled input passed to r2_cmd_str(). Attackers can inject shell metacharacters through the jsonrpc interface parameters to achieve remote code execution on the host running radare2-mcp without requiring authentication.
Required Actions
Update radare2-mcp to a version higher than 1.6.0 immediately. Until the update is applied, restrict network access to the jsonrpc interface to localhost or trusted clients only, take down publicly exposed radare2-mcp instances, and monitor logs for requests containing shell metacharacters (;, &&, |, backtick).
Who Is Affected?
This vulnerability affects radare2-mcp in all versions up to and including 1.6.0. Check whether your organization uses this MCP server for reverse engineering and update it to the patched version without delay.
Sources
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