CVE-2026-22803: @sveltejs/kit has memory amplification DoS vulnerability in Remote Functions binary form deserializer (application/x-sveltekit-formdata)
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.
References
- github.com/advisories/GHSA-j2f3-wq62-6q46
- github.com/sveltejs/kit
- github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5
- github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.49.5
- github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46
- nvd.nist.gov/vuln/detail/CVE-2026-22803
Code Behaviors & Features
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