9.1

CVE-2025-67647: SvelteKit Denial of service and possible SSRF when using prerendering

Analyzed
AliasesGHSA-j62c-4x62-9r35
Published 15-01-2026Last modified 15-01-2026

Vulnerability summary

CVE-2025-67647 is a critical (CVSS 9.1) Uncaught Exception vulnerability in svelte adapter-node. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 44% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.4 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.52%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 15-01-2026
    PublishedVulnerability first disclosed.
  2. 15-01-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 0.53% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

@sveltejs2 products
  • adapter-node≥ 5.4.1, < 5.5.1
  • kit≥ 2.19.0, < 2.49.5
Svelte2 products
Sveltejs1 product
  • kit≥ 2.19.0, < 2.49.5

3 vendors · 5 products

References

6 links