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Advisories

SvelteKit before 3.0.0 SSRF via Redirects in Server-Side Self-Fetch Fallbacks

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Severity
medium
Date
Affecting

  • kit >= 0, < 3.0.0

CWE
  • CWE-918 Server-Side Request Forgery (SSRF)
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
Rich-Harris
Description
SvelteKit before 3.0.0 contains a server-side request forgery vulnerability that allows remote attackers to reach internal services because self-fetch fallbacks follow HTTP redirects automatically. Attackers can manipulate the Host or forwarded headers to point fallback requests at their server, which redirects them to internal services.

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