SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering

Description

Versions of SvelteKit are vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions.

Recommendation

Update the @sveltejs/kit package to the latest compatible version. Followings are version details:

• Affected version(s): >= 2.19.0, <= 2.49.4
• Patched version(s): 2.49.5

References

• GHSA-j62c-4x62-9r35
• CVE-2025-67647
• CWE-248
• CWE-400
• CWE-918
• CAPEC-310
• OWASP 2021-A10
• OWASP 2021-A6

Related Issues

• axios Requests Vulnerable To Possible SSRF and Credential Leakage via Absolute URL - CVE-2025-27152
• youtube-regex vulnerable to Regex Denial of Service - CVE-2025-65122
• SvelteKit vulnerable to Cross-Site Request Forgery - CVE-2023-29003
• is_js vulnerable to Regular Expression Denial of Service - CVE-2020-26302

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Tags:

npm

@sveltejs/kit