Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.
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History
Wed, 13 May 2026 20:15:00 +0000
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Vercel
Vercel next.js |
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Vercel
Vercel next.js |
Wed, 13 May 2026 19:30:00 +0000
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ssvc
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Wed, 13 May 2026 18:00:00 +0000
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| Description | Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5. | |
| Title | Next.js: Server-side request forgery in applications using WebSocket upgrades | |
| Weaknesses | CWE-918 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-13T18:19:41.524Z
Reserved: 2026-05-06T21:49:12.424Z
Link: CVE-2026-44578
Updated: 2026-05-13T18:09:18.775Z
Status : Awaiting Analysis
Published: 2026-05-13T18:16:17.990
Modified: 2026-05-13T18:17:16.127
Link: CVE-2026-44578
No data.
OpenCVE Enrichment
Updated: 2026-05-13T20:30:04Z