Vulnerability · Published Sep 29, 2026 · Assigned by VulnCheck
CVE-2026-102878mcp-chrome-bridge through 1.0.31 CORS Origin Bypass
High 8.1
In plain English
A high-severity security flaw in mcp-chrome-bridge from hangwin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| hangwin | mcp-chrome-bridge | 0 – through 1.0.31 |
Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
References
- https://github.com/hangwin/mcp-chrome/issues/384 issue-tracking
- https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts technical-description
- https://github.com/hangwin/mcp-chrome product
- VulnCheck Advisory: mcp-chrome-bridge through 1.0.31 CORS Origin Bypass third-party-advisory