What’s Vulnerable › Vulnerabilities

CVE-2026-82260: SvelteKit before 2.52.2 Memory Exhaustion via Remote Form Deserialization

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-08
• Weakness: CWE-400

Description

SvelteKit (@sveltejs/kit) versions >=2.49.0 and <=2.52.1 with experimental remote functions (experimental.remoteFunctions) and form enabled contain a memory exhaustion vulnerability in remote form deserialization. Malformed form data can cause excessive memory allocation, crashing the server process and resulting in denial of service. Fixed in 2.52.2.

Affected products

• sveltejs kit: from 2.49.0 before 2.52.2 — fixed in 2.52.2

How to fix

Upgrade to a fixed version: sveltejs kit 2.52.2. Check the vendor advisory for mitigations.

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-vrhm-gvg7-fpcf
• https://www.vulncheck.com/advisories/sveltekit-before-2.52.2-memory-exhaustion-via-remote-form-deserialization

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