What is CVE-2026-6942?

CVE-2026-6942 is a critical-severity vulnerability in Radare Radare2 Mcp Server, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-23.

How severe is CVE-2026-6942?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Radare Radare2 Mcp Server

CVE-2026-6942

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.030 (87.1th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.030 · change: +0.011

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

Pull Request (issue-tracking, Exploit, technical-description, exploit, Issue Tracking)
Patch Commit (issue-tracking, Patch, patch)
www.vulncheck.com/advisories/radare2-mcp-os-command-injection-via-shell-metacha… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-6942?: CVE-2026-6942 is a critical-severity vulnerability in Radare Radare2 Mcp Server, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-23.
How severe is CVE-2026-6942?: Critical severity. CVSS v3 base score is 9.8 out of 10.