---
id: CVE-2026-102878
title: >-
  mcp-chrome-bridge through 1.0.31 contains an origin validation error in the
  native-server HTTP API that allows attackers to bypass CORS restrictions
summary: >-
  mcp-chrome-bridge through 1.0.31 contains an origin validation error in the
  native-server HTTP API that allows attackers to bypass CORS restrictions.
  Attackers can craft malicious web pages that make cross-origin requests to the
  local se…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-346
vendor: hangwin
product: mcp-chrome-bridge
affected:
  - mcp-chrome-bridge <= 1.0.31
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T21:17:18.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102878'
references:
  - url: 'https://github.com/hangwin/mcp-chrome'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts
    label: disclosure@vulncheck.com
  - url: 'https://github.com/hangwin/mcp-chrome/issues/384'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypass
    label: disclosure@vulncheck.com
  - url: 'https://github.com/hangwin/mcp-chrome/issues/384'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-29T20:18:47.075987Z'
ingestedAt: '2026-09-29T20:46:06.443Z'
---

## Overview

mcp-chrome-bridge through 1.0.31 contains an origin validation error in the native-server HTTP API that allows attackers to bypass CORS restrictions. Attackers can craft malicious web pages that make cross-origin requests to the local server and invoke browser automation tools including script execution, page content reading, and screenshot capture.

## Remediation

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