PT-2026-145769

CVE-2026-123139

·

Published

2026-11-12

·

Updated

2026-11-12

Description by

CVSS 4.0
5.8
Medium
MetricsAV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Improper verification of the source of a communication channel vulnerability in Opera Neon on macOS and Windows allows a malicious browser extension to take control of the browser by sending commands through MCP Hub to the built-in Browser Operator extension. This issue affects Opera Neon MCP Hub extension: 0.0.1.
Exploitability
Fix
Researchers
Vendors
Affected products
Weakness enumeration
CWE-940: Improper Verification of Source of a Communication Channel
Related identifiers
CVE-2026-123139
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