Browser Extension
Malware bypasses browser checks to force install Chrome, Edge extensions
A banking malware operation active since mid-2025 has been using a toolkit named KREMLIN to install malicious Chrome and Edge extensions that steal credentials, session tokens, and sensitive data. Researchers at Elastic Security Labs found that the malicious extensions bypass Chromium’s integrity mechanisms and load in browsers as if they had been approved by the user. […]
Twitch extension with 30K installs exposes users’ OAuth tokens
A browser extension called Twitch Enhanced Viewer | JeetBot, available in the official Chrome and Firefox stores, sends users’ Twitch OAuth session tokens to a commercial bot service. The extension has more than 30,000 installs and is advertised as a legitimate third-party tool for Twitch that can block ads, force 1080p (full HD) playback, bypass […]
Chrome Web Store extensions caught stealing crypto, browser data
Multiple extensions for Google Chrome and Microsoft Edge delivered a malware framework that deployed modules to steal cryptocurrency, sensitive data, and browser history, and to inject ClickFix lures. Researchers say all 19 malicious modules uncovered in the campaign serve distinct purposes and are designed to be “highly extensible.” The operation was uncovered by application security […]
Hundreds of fake Chrome VPN extensions route traffic through a proxy
More than 737 browser extensions published on the Chrome Web Store impersonated well-known VPN and proxy services while routing users’ traffic through SOCKS5 proxies operated by a single provider. Some of the extensions impersonated dozens of established brands, including Proton VPN, NordVPN, Surfshark, ExpressVPN, and Cloudflare’s 1.1.1.1 public domain name system (DNS) resolver. Researchers at […]
Google Chrome may soon block New Tab hijacker extensions by default
Google is preparing a new Chrome security feature that would block policy-installed extensions from hijacking the New Tab page or changing the default search engine. GeekFeed spotted the protection in a chain of work-in-progress Chromium Gerrit changes. It has not shipped yet, but Google plans to enable it by default once the changes are approved. […]
Adobe Chrome extension flaw let sites access private WhatsApp chats
The Adobe Acrobat extension for Chrome could be used to access conversations and data rendered in WhatsApp Web without any form of authentication. The attack exploits a chain of vulnerabilities, collectively tracked as CVE-2026-48294 and dubbed HermeticReader by researchers at cybersecurity firm Guardio. Exploiting them requires only that the target running the Adobe Acrobat extension […]
Claude Chrome extension flaw lets malicious extensions trigger AI actions
A flaw in Anthropic’s Claude for Chrome browser extension could allow a malicious extension to trigger predefined AI actions by simulating user clicks, potentially allowing it to abuse Claude’s access to connected services such as Gmail, Google Docs, Google Calendar, and Salesforce. The issue was discovered by Ax Sharma of Manifold Security, who says it […]
Fake Perplexity extension on Chrome Web Store tracked searches
A malicious extension in the Chrome Web Store is masquerading as the Perplexity AI answer engine, intercepting search traffic and collecting browsing information. Called “Search for perplexity ai,” the extension routed search queries and real-time suggestions through its infrastructure before redirecting users to the legitimate search services. Microsoft Threat Intelligence researchers said that the extension […]
Malicious Edge extension abuses Native Messaging as bridge to malware
A malicious Microsoft Edge extension dubbed ‘Edgecution’ has been used in a ransomware attack to escape the browser sandbox and deploy a Python-based backdoor. Access to the local system is obtained by leveraging the Chrome Native Messaging protocol that allows browser extensions to interact with native desktop applications, such as a password manager communicating with […]
Over 100 Chrome Web Store extensions steal user accounts, data
More than 100 malicious extensions in the official Chrome Web Store are attempting to steal Google OAuth2 Bearer tokens, deploy backdoors, and carry out ad fraud. Researchers at application security company Socket discovered that the malicious extensions are part of a coordinated campaign that uses the same command-and-control (C2) infrastructure. The threat actor published the […]