Vulnerability · Published Oct 21, 2026 · Assigned by VulnCheck
CVE-2026-114062SvelteKit before 3.0.0 SSRF via Redirects in Server-Side Self-Fetch Fallbacks
Medium 5.3
In plain English
A medium-severity server-side request forgery in kit from sveltejs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 71.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-prjg-x2qj-wj3g) vendor-advisory
- VulnCheck Advisory: SvelteKit before 3.0.0 SSRF via Redirects in Server-Side Self-Fetch Fallbacks third-party-advisory