CVE-2026-6942Public exploitNetwork attack vector

Unauthenticated command execution via shell metacharacter bypass

Published Apr 23, 2026 · Updated Apr 23, 2026

OS command injection in radare2-mcp 1.6.0 and earlier allows remote attackers to execute arbitrary host commands through JSON-RPC. The JSON-RPC interface passes user-controlled parameters to r2_cmd_str(), where shell metacharacters bypass the command filter and reach the host shell. No authentication is required when an exposed MCP endpoint accepts the crafted request, and commands run with the server process's privileges.

CVSS severity9.3
Critical
EPSS probability1.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in radare2-mcp 1.6.0 and earlier allows remote attackers to execute arbitrary host commands through JSON-RPC. The JSON-RPC interface passes user-controlled parameters to r2_cmd_str(), where shell metacharacters bypass the command filter and reach the host shell. No authentication is required when an exposed MCP endpoint accepts the crafted request, and commands run with the server process's privileges.

The record

CVE
CVE-2026-6942
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
radareorg
Product
radare2
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

radareorg · radare2version=0 <1.6.0

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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