CSS:the bomb inside your inbox Gareth Heyes… — Front End World — TG.ME

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CSS:the bomb inside your inbox

Gareth Heyes - [email protected] - @garethheyes It's quite common for webmail clients to render untrusted CSS in a trusted UI. They attempt to make this safe using CSS sanitization. In this

https://portswigger.net/research/css-the-bomb-inside-your-inbox

t.me/front_end_first/6924

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August 30, 2026 489 3