🤖 PortSwigger research: malicious email content can escape its message boundary and attack the webmail UI. Chains against Outlook, Gmail, Fastmail, Proton, Yahoo and AOL can steal passwords, leak tokens and hijack trusted UI actions. 🔗 https://thehackernews.com/2026/08/new-css-attacks-can-break-webmail.html #CyberSec #InfoSec #EmailSecurity