Browser Security
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108 malicious Chrome extensions linked to shared server, data theft
Researchers found 108 malicious Chrome extensions tied to one backend server, with the add-ons used to steal account data, exfiltrate Telegram sessions and inject ads or scripts into visited pages.
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Microsoft to block unauthorized scripts on Entra ID sign-ins with CSP update
Microsoft will change the Content Security Policy for browser-based Entra ID sign-ins at login.microsoftonline.com to block unauthorized scripts and allow only trusted Microsoft domains, with a global rollout beginning mid-to-late October 2026; organisations are asked to test sign-in flows and avoid tools that inject code.
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Researchers warn spoofed AI sidebars can trick Atlas and Comet users into dangerous actions
Security researchers at SquareX say they can use a malicious browser extension to overlay a fake AI sidebar in Atlas and Comet, tricking users into phishing pages, OAuth theft of Gmail/Drive access, or running commands that install a reverse shell.
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Microsoft tightens Edge’s Internet Explorer mode after reports of exploit chain
Microsoft said it has tightened Internet Explorer mode in Edge after reports that attackers used social engineering and unpatched Chakra 0-day exploits to gain remote code execution and escalate privileges, and the company removed easier IE mode launch options and now requires explicit enabling.
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Researchers warn of DOM-based extension clickjacking in password managers
Security researchers at DEF CON 33 revealed a DOM-based extension clickjacking flaw affecting popular password-manager browser extensions, capable of stealing credentials, 2FA codes, and more with a single click on a malicious page; Bitwarden has issued a fix, and others are in progress, with guidance to disable auto-fill until patches are deployed.
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Over 100 Malicious Chrome Extensions Discovered Posing as Legitimate Tools
Over 100 malicious Chrome browser extensions were found masquerading as legitimate tools, enabling credential theft and unauthorized access to user data. Experts warn users to remain vigilant when downloading browser extensions.
