5.3
Medium
CVE-2026-66062 SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte
Description
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.70.2, the content negotiation header parser used by SvelteKit's request handling (for headers such as Accept) uses a regular expression vulnerable to quadratic backtracking, so a maliciously crafted header value can cause excessive CPU consumption and degrade or deny service. Version 2.70.2 fixes the issue.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| kit 2.70 | earliest → < 2.70.2 | 2.70.2 |
Other CVEs of kit
The 22 CVEs of kit →
CVE-2026-114063
SvelteKit (@sveltejs/kit) from 2.10.0 before 3.0.0 contains a path traversal vulnerability in the vite preview server on…
8.7
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CVE-2026-114062
SvelteKit before 3.0.0 contains a server-side request forgery vulnerability that allows remote attackers to reach…
6.9
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CVE-2026-114061
SvelteKit (@sveltejs/kit) before 3.0.0 contains a cross-site scripting vulnerability in prerendered pages because a…
2.3
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CVE-2026-114060
SvelteKit (@sveltejs/kit) before 3.0.0 contains an open redirect vulnerability in enhanced form actions (use:enhance) on…
2.1
Low