The story’s score and claims

Comments on No. 26 of 155 · PortSwigger Research · edition of Wednesday 28 October 2026

Scalable Vector Grief

Summary

A security researcher reports bypassing six of eight popular SVG sanitizer libraries, using techniques such as XHTML namespace switching, animated JavaScript URLs, XSLT stylesheets delivered via data URLs, a Link response header that triggers XSS in Firefox, and importing GIFs as SVG in Safari.

Comments

Ranked by a public rubric, not by votes: what a comment adds counts, not who wrote it. How comments are ranked · Comment rules