Memory Exhaustion Vulnerability in SvelteKit by Svelte
CVE-2026-82260

8.7HIGH

Key Information:

Vendor

Sveltejs

Status
Kit
Vendor
CVE Published:
28 August 2026

What is CVE-2026-82260?

SvelteKit versions between 2.49.0 and 2.52.1 are vulnerable to a memory exhaustion issue triggered by malformed form data during remote form deserialization. This vulnerability can lead to excessive memory allocation, potentially crashing the server process and resulting in a denial-of-service scenario. Users are encouraged to upgrade to version 2.52.2 or later to mitigate this risk.

Affected Version(s)

kit 2.49.0 < 2.52.1

kit 2.52.1

References

https://github.com/sveltejs/kit/security/advisories/GHSA-...
vendor-advisory
https://www.vulncheck.com/advisories/sveltekit-before-2.5...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

elliott-with-the-longest-name-on-github
.