CVE-2026-22803

HIGH
2026-01-15 [email protected] GHSA-j2f3-wq62-6q46
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
Patch Released
Jan 21, 2026 - 20:34 nvd
Patch available
CVE Published
Jan 15, 2026 - 19:16 nvd
HIGH 7.5

Tags

Denial Of Service 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.

Analysis

SvelteKit versions 2.49.0 through 2.49.4 are vulnerable to denial-of-service attacks through the experimental form remote function, which fails to properly validate binary-encoded form payloads and can be exploited to exhaust server memory. An unauthenticated remote attacker can craft a malicious payload to trigger excessive memory allocation, rendering affected applications unavailable. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

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CVE-2026-22803 vulnerability details – vuln.today
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