All vulnerabilities
CVE-2026-114062GHSA-prjg-x2qj-wj3g

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

sveltejs kit
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.29%Chance of exploitation activity in the next 30 days, higher than 20% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.0.0Fixed versionCVE List
Published21 Oct 2026Updated 22 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • kitaffected: all versions before 3.0.0CVE List
  • kitunaffected: 3.0.0CVE List

References 2