CVE-2026-82259
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Aug 28, 2026
Vendor
unknown
Description
SvelteKit versions from 2.49.0 through 2.53.2 (fixed in 2.53.3) contain a deserialization expansion issue in the experimental form remote function. When an application enables experimental.remoteFunctions and uses the form function to process the files array without validating files.length or individual file sizes, an attacker can submit relatively small inputs that expand into very large file arrays, leading to expensive processing and denial of service.