Preliminary research

SvelteSpill: A Cache Deception Bug in SvelteKit + Vercel

Jorian Woltjer · Aikido Security

AI-collected research leads through 22 September 2026, including targeted additions between broader sweeps. 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

Topic

HTTP

In the archive

• Collected in the 2026 preliminary research sweep

Related sources

• SvelteSpill CVE-2026-27118 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; this one was last captured on 13 September 2026.