CVE-2022-23646 Improper CSP in Image Optimization API for Next.js
Attackers can exploit improper CSP in Next.js Image Optimization API to perform UI misrepresentation via SVGs if specific image domains are configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-23646?
CVE-2022-23646 is a medium-severity cross-site scripting vulnerability in Vercel Next.js, published on 17 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Next.js is a React framework. Starting with version 10.0.0 and prior to version 12.1.0, Next.js is vulnerable to User Interface (UI) Misrepresentation of Critical Information. In order to be affected, the `next.config.js` file must have an `images.domains` array assigned and the image host assigned in `images.domains` must allow user-provided SVG. If the `next.config.js` file has `images.loader` assigned to something other than default, the instance is not affected. Version 12.1.0 contains a patch for this issue. As a workaround, change `next.config.js` to use a different `loader configuration` other than the default.
Weakness: CWE-451
Which versions are affected by CVE-2022-23646?
2 open source packages ship an affected version, including next. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
next npm | From 10.0.0 | 12.1.0 |
next npm | From 10.0.0 | 12.1.0 |
Products include Vercel Next.js.
How do I fix CVE-2022-23646?
Upgrade next to 12.1.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2022-23646 being exploited?
There is no known exploitation of CVE-2022-23646 in the wild and no public exploit code.
Other vulnerabilities in Vercel Next.js
- CVE-2025-29927 Authorization Bypass in Next.js Middleware
- CVE-2026-44578 Next.js: Server-side request forgery in applications using WebSocket upgrades
- CVE-2026-94483 Next.js: Server-Side Request Forgery in Image Optimization
- CVE-2026-64642 Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
- CVE-2026-64645 Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname
Sources
Also known as GHSA-fmvm-x8mv-47mj, ROOT-APP-NPM-CVE-2022-23646.