What is CVE-2026-82261?

CVE-2026-82261 is a high-severity vulnerability in Sveltejs Kit, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-28.

How severe is CVE-2026-82261?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Sveltejs Kit

CVE-2026-82261

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.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Sveltejs Kit

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-82261?: CVE-2026-82261 is a high-severity vulnerability in Sveltejs Kit, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-28.
How severe is CVE-2026-82261?: High severity. CVSS v3 base score is 7.5 out of 10.