Bug 2477207 (CVE-2026-44574)

Summary: CVE-2026-44574 Next.js: Next.js: Authorization bypass via crafted query parameters
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin, chfoley, eborisov, gotiwari, jgrulich, jhorak, kaycoth, lball, mvyas, ngough, rgodfrey, rhel-process-autobot, swoodman, tpopela, veshanka, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Next.js. This vulnerability allows an attacker to bypass security checks in web applications that use Next.js middleware to protect specific web pages. By sending specially crafted web addresses, an attacker can access protected content without proper authorization. This could lead to unauthorized viewing of sensitive information or access to restricted features.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2484231, 2484238, 2484241, 2484244, 2484254, 2484255, 2484256    
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Description OSIDB Bzimport 2026-05-13 18:02:43 UTC 
Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. This vulnerability is fixed in 15.5.16 and 16.2.5.
Comment 2 errata-xmlrpc 2026-07-02 00:04:47 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