CVE-2026-3484: Mcp nmap server MCP NMAP Server Has An Vulnerability

MODERATE
Advisory Identifier: GHSA-xc68-rrqc-qgq3
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CVSS 6.3
CWE-74 CWE-77
Published
Advisory Summary

CVE-2026-3484 is a MODERATE (CVSS 6.3) mcp nmap server has an vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Mcp nmap server libraries in the npm ecosystem. The issue involves mcp nmap server has an injection vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2026-3484 at a Glance

CVE Identifier CVE-2026-3484
GHSA Identifier GHSA-xc68-rrqc-qgq3
Severity MODERATE
CVSS v3.1 Base Score 6.3
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Mcp nmap server
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-3484

To remediate this vulnerability, upgrade all affected Mcp nmap server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mcp-nmap-server fixed: Latest secure release 
npm install mcp-nmap-server@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls mcp-nmap-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-3484, inspect your project dependencies using npm:

npm ls mcp-nmap-server

Analyze the terminal output to locate any version of Mcp nmap server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls mcp-nmap-server command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. In Mcp nmap server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-3484 Affected Mcp nmap server Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
mcp-nmap-server
npm/mcp-nmap-server
npm
≤ 1.0.1

References

NVD — CVE-2026-3484 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3484
Mcp nmap server Source Repository REPOSITORY
https://github.com/PhialsBasement/nmap-mcp-server/issues/7
Mcp nmap server Source Repository REPOSITORY
https://github.com/PhialsBasement/nmap-mcp-server/issues/7#issuecomment-3814382570
Security Fix Commit FIX COMMIT
https://github.com/PhialsBasement/nmap-mcp-server/commit/30a6b9e1c7fa6146f51e28d6ab83a2568d9a3488
Mcp nmap server Source Repository REPOSITORY
https://github.com/PhialsBasement/nmap-mcp-server
vuldb.com/ WEB
https://vuldb.com/?ctiid.348559
vuldb.com/ WEB
https://vuldb.com/?id.348559
vuldb.com/ WEB
https://vuldb.com/?submit.763773
vuldb.com/ WEB
https://vuldb.com/?submit.763777

Frequently Asked Questions

What is CVE-2026-3484?
CVE-2026-3484 is a security vulnerability in Mcp nmap server involving MCP NMAP Server has an Injection vulnerability under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Mcp nmap server versions are affected?
Affected versions include releases prior to current release patches across affected packages: mcp-nmap-server.
What version fixes CVE-2026-3484?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is mcp-nmap-server affected?
Yes, mcp-nmap-server is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-3484?
CVE-2026-3484 has a CVSS v3.1 base score of 6.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-3484?
CVE-2026-3484 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2026-3484?
Run the dependency tree command: 'npm ls mcp-nmap-server'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xc68-rrqc-qgq3",
  "modified" : "2026-03-04T21:15:13Z",
  "published" : "2026-03-03T21:31:16Z",
  "aliases" : [ "CVE-2026-3484" ],
  "summary" : "MCP NMAP Server has an Injection vulnerability",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "mcp-nmap-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-3484"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PhialsBasement/nmap-mcp-server/issues/7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PhialsBasement/nmap-mcp-server/issues/7#issuecomment-3814382570"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PhialsBasement/nmap-mcp-server/commit/30a6b9e1c7fa6146f51e28d6ab83a2568d9a3488"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/PhialsBasement/nmap-mcp-server"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?ctiid.348559"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.348559"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?submit.763773"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?submit.763777"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74", "CWE-77" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-04T21:15:13Z",
    "nvd_published_at" : "2026-03-03T20:16:50Z"
  }
}