Preliminary research
Roundcube: remote-content and CSS sanitizer bypasses
AI-collected research leads through 6 October 2026, including bounded month-by-month reviews of selected social and community sources from January through September. Unranked, incomplete, not community-vetted, and subject to change.
Traces Roundcube SVG feImage handling into a policy route intended for ordinary links. Because the browser fetches the image resource while the sanitizer treats its href differently from image sources, email content can initiate remote requests despite remote-image blocking; source and patch discussion identify the routing mismatch.
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- nullcathedral
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- nullcathedral
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This page is the archive's own catalogue record. The research is the work of nullcathedral, first published at the original source. Preserved copies are kept so the citation survives its host.