# CVE-2026-6942: radare2-mcp <=1.6.0 OS Command Injection via Shell Metacharacter Bypass

> Remote attackers can execute arbitrary commands on the host via shell metacharacter injection in radare2-mcp without authentication.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Apr 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-g65f-grqm-9jg5

## What is CVE-2026-6942?

CVE-2026-6942 is a critical command injection vulnerability in radareorg radare2-mcp, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-6942?

It affects 1 product.


Products: Radare Radare2 Mcp Server.

## How do I fix CVE-2026-6942?

No fix has been published for CVE-2026-6942 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6942 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6942 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6942 and fix it if it is affected.

What it is: CVE-2026-6942 is a critical command injection vulnerability in radareorg radare2-mcp, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6942 exists.

Affected product: radareorg radare2-mcp. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-6942/ (Markdown: https://insights.sbomify.com/CVE-2026-6942/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6942
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6942
- OSV: https://osv.dev/vulnerability/CVE-2026-6942

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6942/
Summaries are generated and may contain mistakes; the official description above is the record.