Bug 2354069 (CVE-2025-29927)

Summary:	CVE-2025-29927 nextjs: Authorization Bypass in Next.js Middleware
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	bbrownin, caswilli, chfoley, gotiwari, jeder, jgrulich, jhorak, kaycoth, lball, mvyas, ngough, swoodman, tpopela, veshanka
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Next.js package. This vulnerability allows bypassing authorization checks within a Next.js application if the authorization check occurs in middleware.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2354449, 2354450, 2354451, 2354452, 2354453, 2354454, 2354455, 2354456, 2354457
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Description OSIDB Bzimport 2025-03-21 15:01:17 UTC

Next.js is a React framework for building full-stack web applications. Prior to 14.2.25 and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 14.2.25 and 15.2.3.