CVE-2026-3484 PhialsBasement nmap-mcp-server Nmap CLI index.ts child_process.exec command injection
Remote attackers can execute arbitrary commands via the Nmap CLI handler in the nmap-mcp-server library, requiring a patch to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3484?
CVE-2026-3484 is a medium-severity command injection vulnerability in PhialsBasement nmap-mcp-server, published on 3 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in PhialsBasement nmap-mcp-server up to bee6d23547d57ae02460022f7c78ac0893092e38. Affected by this issue is the function child_process.exec of the file src/index.ts of the component Nmap CLI Command Handler. The manipulation results in command injection. The attack may be performed from remote. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The patch is identified as 30a6b9e1c7fa6146f51e28d6ab83a2568d9a3488. It is best practice to apply a patch to resolve this issue.
Which versions are affected by CVE-2026-3484?
2 open source packages ship an affected version, including mcp-nmap-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mcp-nmap-server npm | All versions to 1.0.1 | None |
mcp-nmap-server npm | All versions to 1.0.1 | None |
Products include Phialsbasement Mcp Nmap Server.
How do I fix CVE-2026-3484?
No fix has been published for CVE-2026-3484 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-3484 being exploited?
There is no known exploitation of CVE-2026-3484 in the wild and no public exploit code.
Sources
Also known as GHSA-xc68-rrqc-qgq3.