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CVE-2026-102878

8.1 · HIGH

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.

Published Sep 29, 2026CWE-346EPSS 0.80%

Overview

CVE-2026-102878 is a high-severity vulnerability. It was published on September 29, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/hangwin/mcp-chromeGitHubgithub.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.tsGitHubgithub.com/hangwin/mcp-chrome/issues/384Refwww.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypassGitHubgithub.com/hangwin/mcp-chrome/issues/384

How CyberStrike helps

Frequently asked questions

What is CVE-2026-102878?

CVE-2026-102878 is a high-severity vulnerability. It was published on September 29, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-102878?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-102878?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-102878?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-102878 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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