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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Opera | Neon | unaffected |
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Fixes
Solution
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Workaround
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References
History
Thu, 12 Nov 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Weaknesses | CWE-940 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: Opera
Published:
Updated: 2026-11-12T12:22:07.291Z
Reserved: 2026-11-05T14:21:01.547Z
Link: CVE-2026-123139
Vulnrichment
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Redhat
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OpenCVE Enrichment
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Weaknesses