CVE-2025-67647 json
SvelteKit Denial of service and possible SSRF when using prerendering
published 2026-01-15 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2791 , GHSA-j62c-4x62-9r35
- cvss
- 9.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm @sveltejs/kit 2.49.5
- npm @sveltejs/adapter-node 5.5.1
- svelte adapter-node 2.49.5
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.4 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N |
| CNA | 4.0 | 8.4 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @sveltejs/kit | >=2.19.0, <2.49.5 |
2.49.5 |
| npm | @sveltejs/adapter-node | >=5.4.1, <5.5.1 |
5.5.1 |
Affected products
- sveltejs kit
Classification
References
-
github.com
/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226
web, patch
-
github.com
/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-67647
advisory
-
github.com
/sveltejs/kit
package
-
github.com
/sveltejs/kit/releases/tag/%40sveltejs%2Fadapter-node%405.5.1
web
-
github.com
/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.49.5
web
Sources
- CVE List CVE-2025-67647
- GitHub Advisory GHSA-j62c-4x62-9r35
- NVD CVE-2025-67647
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.