CVE-2026-82259
CVE-2026-82259 · SvelteKit 2.49.0 before 2.53.3 Denial of Service via form
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.7 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
kit
- Versions
- ≥ 2.49.0, < 2.53.3: Affected (semver)
- 2.53.3: Not affected (semver)
Update to 2.53.3
@sveltejs/kit npm
- Affected ranges
- SEMVER: ≥ 2.49.0, < 2.53.3
Update to 2.53.3