---
id: CVE-2026-109332
title: >-
  Network-AI (npm network-ai) before 5.15.2 contains an origin validation error
  in McpSseServer._handleRequest in lib/mcp-transport-sse.ts that reflects
  localhost Origins into Access-Control-Allow-Origin regardless of bind
  interface
summary: >-
  Network-AI (npm network-ai) before 5.15.2 contains an origin validation error
  in McpSseServer._handleRequest in lib/mcp-transport-sse.ts that reflects
  localhost Origins into Access-Control-Allow-Origin regardless of bind
  interface. When …
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'
cwe:
  - CWE-346
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:29.140'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109332'
references:
  - url: >-
      https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-4pvg-m42h-c3x2
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/network-ai-before-5.15.2-cors-origin-validation-error-in-mcp-sse-transport
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.205Z'
---

## Overview

Network-AI (npm network-ai) before 5.15.2 contains an origin validation error in McpSseServer._handleRequest in lib/mcp-transport-sse.ts that reflects localhost Origins into Access-Control-Allow-Origin regardless of bind interface. When the server binds a non-loopback address, an attacker page with a localhost Origin visited by a victim can read unauthenticated endpoints like /health cross-origin.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.