MCP API Vulnerability in Comet Browser Allows Full Device Control

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MCP API Vulnerability in Comet Browser Allows Full Device Control

First seen 2 Dec 2025, 18:33 UTC • •17.5

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ThreatCluster •March 12, 2026 at 13:27 UTC

A vulnerability in the obscure MCP API of the Comet Browser has been identified, allowing potential attackers to gain full control over user devices. This breach compromises user trust and highlights significant security flaws in AI-driven browsers. Affected users are urged to take immediate action to secure their devices.

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Threat Graph

3 entities, 2 inferred relationships (STIX 2.1).

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Technique (2)

Data Breach
Malware

Affected Platform (1)

Comet Browser

Relationships

Data Breach targets Comet Browser
Malware targets Comet Browser

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