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GHSA-j62c-4x62-9r35
No affected components available
Summary
Versions of SvelteKit are vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions.
Details
Affected versions from 2.44.0 onwards are vulnerable to DoS if:
- your app has at least one prerendered route (
export const prerender = true)
Affected versions from 2.19.0 onwards are vulnerable to DoS and SSRF if:
- your app has at least one prerendered route (
export const prerender = true) - AND you are using
adapter-nodewithout a configuredORIGINenvironment variable, and you are not using a reverse proxy that implements Host header validation
Impact
The DoS causes the running server process to end.
The SSRF allows access to internal services that can be reached without authentication when fetched from SvelteKit's server runtime.
It is also possible to obtain an SXSS via cache poisoning, by forcing a potential CDN to cache an XSS returned by the attacker's server (the latter being able to specify the cache-control of their choice).
Credits
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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