CVE-2026-82261

HIGH 7.5

SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

SvelteKit (@sveltejs/kit) versions >=2.49.0 and <=2.52.1 with experimental remote functions and form enabled contain a CPU exhaustion vulnerability in form deserialization. An attacker can send malformed form data to cause the server to become unresponsive while processing the request, resulting in denial of service. Fixed in 2.52.2.

CWE	CWE-400
Vendor	sveltejs
Product	kit
Published	Aug 28, 2026

Stay Ahead of the Next One

Get instant alerts for sveltejs kit

Be the first to know when new high vulnerabilities affecting sveltejs kit are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Affected Versions

sveltejs / kit

2.49.0 < 2.52.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/sveltejs/kit/security/advisories/GHSA-88qp-p4qg-rqm6 vulncheck.com: https://www.vulncheck.com/advisories/sveltekit-before-2.52.2-cpu-exhaustion-via-remote-form-deserialization

Credits

elliott-with-the-longest-name-on-github