CVE-2026-102878 mcp-chrome-bridge through 1.0.31 CORS Origin Bypass
Attackers can bypass CORS restrictions to invoke browser automation tools, enabling script execution and data theft via malicious web pages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-102878?
CVE-2026-102878 is a high-severity vulnerability in hangwin mcp-chrome-bridge, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-346
Which versions are affected by CVE-2026-102878?
How do I fix CVE-2026-102878?
No fix has been published for CVE-2026-102878 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102878 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102878 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-wfc7-pjhg-rg95.