Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck
CVE-2026-82256SvelteKit before 2.69.1 Denial of Service via Remote Form
Medium 5.3
In plain English
A medium-severity uncontrolled resource consumption in kit from sveltejs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SvelteKit before 2.69.1 fails to properly validate remote form function payload sizes, allowing attackers to crash the Node process by sending large payloads. Repeated exploitation causes denial of service by repeatedly crashing the application process.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @sveltejs/kit | 2.69.1 | GHSA-wqjv-9729-c5q2 |
Affected products (as reported)
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- GitHub Security Advisory (GHSA-wqjv-9729-c5q2) vendor-advisory
- VulnCheck Advisory: SvelteKit before 2.69.1 Denial of Service via Remote Form third-party-advisory