CVE-2026-114062 SvelteKit before 3.0.0 SSRF via Redirects in Server-Side Self-Fetch Fallbacks
Medium 6.9
Published
Updated
Check this codebase for CVE-2026-114062 and fix it if it is affected.
What it is: CVE-2026-114062 is a medium-severity vulnerability in sveltejs kit, published on 21 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-114062 in the wild and no public exploit code.
Affected product: sveltejs kit. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-114062/ (Markdown: https://insights.sbomify.com/CVE-2026-114062/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-114062?
CVE-2026-114062 is a medium-severity vulnerability in sveltejs kit, published on 21 Oct 2026.
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-114062?
How do I fix CVE-2026-114062?
No fix has been published for CVE-2026-114062 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-114062 being exploited?
There is no known exploitation of CVE-2026-114062 in the wild and no public exploit code.
Sources
Also known as GHSA-33hm-j2q7-c3hp, GHSA-prjg-x2qj-wj3g.