CVE-2026-22803

HIGH8.2

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

Published Jan 15, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5

WEB

https://github.com/sveltejs/kit/releases/tag/@sveltejs%2Fadapter-node@5.5.1

WEB

https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-22803

CVSS Analysis

CVSS v4.0

8.2