CVE-2026-82261 PUBLISHED

SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization

Assigner: VulnCheck
Reserved: 28.08.2026 Published: 28.08.2026 Updated: 28.08.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	sveltejs
Product	kit
Versions	Default: unaffected affected from 2.49.0 to 2.52.1 (excl.) Version 2.52.1 is unaffected

CVE-2026-82261 PUBLISHED

SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization

Metrics

Product Status

Credits

References

Problem Types