Push Security Ships Automatic Detection and Blocking for Malicious Browser Extensions

A Quiet Threat Gets a Loud Answer

Browser extensions are one of the most underestimated attack surfaces in enterprise security. They run with elevated permissions, persist silently after installation, and can remain active in employee browsers even after being pulled from web stores. Push Security just gave defenders a powerful new tool to fight back.

The company launched automatic detection and blocking for malicious browser extensions on March 5, drawing from a continuously updated threat intelligence database. Security teams can now identify compromised or known-malicious add-ons running across their organization's browsers and take immediate action.

How It Works

Push Security offers two operational modes. In Monitor mode, the system flags malicious extensions and alerts security teams without disrupting users — ideal for organizations that want visibility before enforcement. In Block mode, the system automatically disables the offending extension and prevents reinstallation, removing the threat in real time.

The detection engine cross-references installed extensions against known indicators of compromise, behavioral signatures, and permission anomalies. When an extension is identified as malicious — whether it's a session hijacker, a credential stealer, or a data exfiltration tool — the system responds before damage is done.

Why This Matters Now

Extension-based attacks have surged over the past eighteen months. Threat actors increasingly target popular extensions through supply chain compromises — buying out legitimate extensions from developers and pushing malicious updates to unsuspecting users. Traditional endpoint security often misses these attacks because the malicious code runs inside the browser sandbox.

Push Security's approach puts the defense exactly where the threat lives: in the browser itself. It's proactive, it's automated, and it turns what was once a blind spot into a monitored perimeter.

Sources: Help Net Security (March 5, 2026), BusinessWire (March 5, 2026)