High severity · published Sep 29, 2026
CVE-2026-102878
mcp-chrome-bridge through 1.0.31 CORS Origin Bypass
8.1
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
mcp-chrome-bridge · hangwin
through 1.0.31 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102878
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102878
issue-tracking
https://github.com/hangwin/mcp-chrome/issues/384
technical-description
https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts
product
https://github.com/hangwin/mcp-chrome
third-party-advisory
https://www.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypass