Bug 2477187 (CVE-2026-44578)

Summary:	CVE-2026-44578 Next.js: Next.js: Server-Side Request Forgery via crafted WebSocket upgrade requests
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bbrownin, chfoley, eborisov, gotiwari, jgrulich, jhorak, kaycoth, lball, mvyas, ngough, rgodfrey, rhel-process-autobot, swoodman, tpopela, veshanka, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Next.js. Self-hosted applications utilizing the built-in Node.js server are vulnerable to Server-Side Request Forgery (SSRF) through specially crafted WebSocket upgrade requests. A remote attacker can exploit this by causing the server to proxy requests to arbitrary internal or external destinations. This could lead to the exposure of internal services or sensitive cloud metadata endpoints.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2484253, 2484266, 2484268, 2484251, 2484269, 2484270, 2484271
Bug Blocks:

Description OSIDB Bzimport 2026-05-13 18:01:36 UTC

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.

Comment 2 errata-xmlrpc 2026-07-02 00:05:00 UTC

This issue has been addressed in the following products:

  Streams for Apache Kafka 2.9.4

Via RHSA-2026:34608 https://access.redhat.com/errata/RHSA-2026:34608