mcp-chrome-bridge through 1.0.31 CORS Origin Bypass (CVE-2026-102878) | HOL Guard CVE

High · CVSS 8.6CVE-2026-102878

mcp-chrome-bridge through 1.0.31 CORS Origin Bypass

Answer in brief

CVE-2026-102878 records a High severity (CVSS 8.6) vulnerability in mcp-chrome-bridge through 1.0.31 CORS Origin Bypass. The current sources do not mark it as known exploited. The current feed maps hangwin/mcp-chrome-bridge (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps hangwin/mcp-chrome-bridge (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
hangwin/mcp-chrome-bridgegeneric	>=0 <=1.0.31	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for hangwin/mcp-chrome-bridge.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.