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CVE-2025-67647

Svelte Adapter-node server-side request forgery (SSRF)

9.1 CRITICALEPSS 0.53%
  1. Published15 Jan 2026

Description

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route (export const prerender = true). From 2.19.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route and you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation. This vulnerability is fixed in 2.49.5.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Svelte Adapter-node≥ 5.4.1 < 5.5.1
Svelte Kit≥ 2.19.0 < 2.49.5

Remediation

Fixed in
Svelte Adapter-node≥ 5.5.1
Svelte Kit≥ 2.49.5

References

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Frequently asked

Is CVE-2025-67647 being actively exploited?

CVE-2025-67647 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.53%.

How severe is CVE-2025-67647?

CVE-2025-67647 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2025-67647?

Affected products include Svelte Adapter-node, Svelte Kit.

How do I fix CVE-2025-67647?

Upgrade affected software to a fixed version, for example Svelte Adapter-node 5.5.1, Svelte Kit 2.49.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-67647 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.