Vulnerability Details CVE-2026-82259
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 30.0%
CVSS Severity
CVSS v3 Score 7.5
References