Preliminary research

SvelteSpill: A Cache Deception Bug in SvelteKit + Vercel

Jorian Woltjer · Aikido Security

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.

Explains a SvelteKit/Vercel cache-deception path where the edge treats a request as an immutable asset while an adapter override returns an authenticated dynamic resource. Failed approaches and request/response traces show routing order, cache population and a later anonymous hit; the upstream fix is adapter-vercel 6.3.2.

Record

Researcher

Jorian Woltjer

Published by

Aikido Security

In the archive

• Collected in the 2026 preliminary research sweep

Related sources

• Vendor security advisory

Tags

• cache-poisoning
• javascript
• info-leak
• case-study

This page is the archive's own catalogue record. The research is the work of Jorian Woltjer, first published at the original source. Preserved copies are kept so the citation survives its host.