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OpenAdvisories
High · 8.2 CVE-2026-22803 EUVD-2026-2789GHSA-j2f3-wq62-6q46

SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer

Published Jan 15, 2026 · Updated Jan 15, 2026 · Assigned by GitHub_M

Description

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From 2.49.0 to 2.49.4, the experimental form remote function uses a binary data format containing a representation of submitted form data. A specially-crafted payload can cause the server to allocate a large amount of memory, causing DoS via memory exhaustion. This vulnerability is fixed in 2.49.5.

Affected products

VendorProductAffectedFixed
sveltejs kit >= 2.49.0, < 2.49.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @sveltejs/kit >= 2.49.0, < 2.49.5 2.49.5 GHSA-j2f3-wq62-6q46

References