CVE-2021-39178

Next.js is a React framework. Versions of Next.js between 10.0.0 and 11.0.0 contain a cross-site scripting vulnerability. In order for an instance to be affected by the vulnerability, the `next.config.js` file must have `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 or the instance is deployed on Vercel, the instance is not affected by the vulnerability. The vulnerability is patched in Next.js version 11.1.1.

• CWE-79
• CWE-79

• https://github.com/vercel/next.js/releases/tag/v11.1.1Patch, Release Notes, Third Party Advisory
• https://github.com/vercel/next.js/security/advisories/GHSA-9gr3-7897-pp7mPatch, Third Party Advisory
• https://github.com/vercel/next.js/releases/tag/v11.1.1Patch, Release Notes, Third Party Advisory
• https://github.com/vercel/next.js/security/advisories/GHSA-9gr3-7897-pp7mPatch, Third Party Advisory

Published

Aug 31, 2021

Last Modified

Jun 17, 2026

Status

Modified

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