VDB-341388 · CVE-2026-22803 · GHSA-j2f3-wq62-6q46

sveltejs kit up to 2.49.4 memory allocation

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6.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in sveltejs kit up to 2.49.4. This vulnerability affects unknown code. The manipulation results in memory allocation. This vulnerability was named CVE-2026-22803. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in sveltejs kit up to 2.49.4. Affected is an unknown code block. The manipulation with an unknown input leads to a memory allocation vulnerability. CWE is classifying the issue as CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-22803 since 01/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.49.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 8ed8155215b9a74012fecffb942ad9a793b274e5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

sveltejs

Name

Version

License

open-source

Website

Product: https://github.com/sveltejs/kit/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: kit 2.49.5
Patch: 8ed8155215b9a74012fecffb942ad9a793b274e5

Timelineinfo

01/09/2026 CVE reserved
01/15/2026 +6 days Advisory disclosed
01/15/2026 +0 days VulDB entry created
01/22/2026 +7 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-j2f3-wq62-6q46
Status: Confirmed

CVE: CVE-2026-22803 (🔒)
GCVE (CVE): GCVE-0-2026-22803
GCVE (VulDB): GCVE-100-341388

Entryinfo

Created: 01/15/2026 20:49
Updated: 01/22/2026 05:45
Changes: 01/15/2026 20:49 (70), 01/22/2026 05:45 (16)
Complete: 🔍
Cache ID: 216::103