CVE-2026-22803

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5	Patch
https://github.com/sveltejs/kit/releases/tag/@sveltejs%2Fadapter-node@5.5.1	Release Notes
https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:svelte:kit:*:*:*:*:*:node.js:*:*

History

21 Jan 2026, 20:34

Type	Values Removed	Values Added
First Time		Svelte Svelte kit
CWE		CWE-770
CPE		cpe:2.3:a:svelte:kit::::::node.js::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5 -~~	() https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5 - Patch
References	~~() https://github.com/sveltejs/kit/releases/tag/@sveltejs%2Fadapter-node@5.5.1 -~~	() https://github.com/sveltejs/kit/releases/tag/@sveltejs%2Fadapter-node@5.5.1 - Release Notes
References	~~() https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46 -~~	() https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46 - Vendor Advisory

15 Jan 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-15 19:16

Updated : 2026-01-21 20:34

NVD link : CVE-2026-22803

Mitre link : CVE-2026-22803

CVE.ORG link : CVE-2026-22803

JSON object : View

Products Affected

svelte

kit

CWE

CWE-789

Memory Allocation with Excessive Size Value

CWE-770

Allocation of Resources Without Limits or Throttling

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