Memory Exhaustion Vulnerability in SvelteKit by Svelte
CVE-2026-22803
8.2HIGH
What is CVE-2026-22803?
A memory exhaustion vulnerability exists in SvelteKit, affecting versions 2.49.0 to 2.49.4. The issue stems from the experimental form remote function, which utilizes a binary data format to handle submitted form data. An attacker can exploit this by sending a specially-crafted payload that causes the server to allocate excessive memory, leading to a denial of service through memory exhaustion. Users are advised to update to version 2.49.5 or later to mitigate this risk.
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Affected Version(s)
kit >= 2.49.0, < 2.49.5
References
CVSS V4
Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None
Timeline
Vulnerability published
Vulnerability Reserved