CVE-2026-22803
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Svelte Kit
PublishedJan 15, 2026
First seenJan 15, 2026
Weakness typeCWE-789CWE-789
How to fix
Update
- svelte kit2.49.5 or later
- @sveltejs/kit2.49.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| svelte kit | 2.49.0 ≤ v < 2.49.5 | 2.49.5 |
| @sveltejs/kitnpm | 2.49.0 ≤ v < 2.49.5 | 2.49.5 |
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