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Malicious Perplexity Chrome Extension Intercepted Searches and Address Bar Input

thehackernews.com 2026-06-30 data leakage High

What Happened

Microsoft has found a malicious Chrome extension that posed as the AI search engine Perplexity and quietly logged what people searched for. It routed every query and every character typed into the address bar through an attacker-controlled server before redirecting users to real results. Microsoft says Google removed it from the store after responsible disclosure. The extension was called "

Why It Matters

Report facts: Microsoft found a malicious Chrome extension masquerading as Perplexity that intercepted searches and address-bar input, then sent queries and browser metadata to an attacker-controlled domain before forwarding users to legitimate results. Microsoft says Google removed the extension from the store after responsible disclosure. CyberSE.AI analysis: this is primarily a data leakage and trust-boundary risk for AI-branded browser tooling, because a spoofed extension can exfiltrate sensitive user intent and browsing context at scale, so extension allowlisting, publisher verification, and monitoring for search-setting changes are critical.

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CyberSE Analysis

This signal maps to data leakage. Organizations using AI agents, LLM APIs, SaaS integrations, or sensitive data workflows should review whether this class of issue could create unauthorized tool execution, data leakage, weak approval gates, or unmanaged supply-chain exposure.

Recommended Actions

  • Restrict AI agent tool permissions and production write paths.
  • Review sensitive data access across prompts, logs, embeddings, memory, and SaaS integrations.
  • Add human approval workflows for high-impact or state-changing actions.
  • Run prompt injection and indirect prompt injection tests against affected workflows.
  • Document the owner, control gap, and remediation deadline for this risk class.

Source

https://thehackernews.com/2026/06/malicious-perplexity-chrome-extension.html

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