Is CVE-2026-22803 actively exploited?

CVE-2026-22803 has no public evidence of in-the-wild exploitation as of 2026-01-21.

What is the CVSS score for CVE-2026-22803?

CVE-2026-22803 has a CVSS score of 8.2 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-22803?

Patch guidance is available from svelte security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-22803.

Fix CVE-2026-22803 - HIGH svelte kit

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.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-789 CWE-770

Metadata

Primary Vendor: SVELTE
Published: 1/15/2026
Last Modified: 1/21/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

svelte : kit

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-22803. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-22803

View on NIST NVD

CVE-2026-22803 vulnerability