# CVE-2026-44578: Next.js: Server-side request forgery in applications using WebSocket upgrades

> CVE-2026-44578: Next.js: Server-side request forgery in applications using WebSocket upgrades. CVSS 8.6 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-44578
Last updated: 2026-08-13T13:19:04Z

- Published: 2026-05-13 17:01 UTC · Updated: 2026-08-13 13:19 UTC · Assigner: GitHub\_M
- CVSS: 8.6 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS: 35.5%, 98th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-918

## 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.

## Affected vendors and products

- Red Hat: Red Hat Enterprise Linux 10
- Red Hat: Red Hat Enterprise Linux 7
- Red Hat: Red Hat Enterprise Linux 8
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3
- Red Hat: Red Hat Trusted Artifact Signer 1.3
- Red Hat: Red Hat Trusted Artifact Signer 1.4
- Red Hat: Streams for Apache Kafka 2.9.4
- Red Hat: streams for Apache Kafka 3
- vercel: next.js

## Tracked companies

- [Vercel](https://rewindex.com/company/vercel.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-44578)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-44578)
- [https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r](https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-44578 · Markdown: https://rewindex.com/cve/CVE-2026-44578.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-44578 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:41.579Z