Bug 2477190 (CVE-2026-45109)

Summary: CVE-2026-45109 next.js: Next.js: Information disclosure via security fix bypass in middleware with Turbopack
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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Doc Text:
A flaw was found in Next.js. A remote unauthenticated attacker could exploit a bypass in a security fix when using middleware.ts with Turbopack. This vulnerability could lead to the disclosure of sensitive information.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2484264, 2484265, 2484272, 2484225, 2484247, 2484258, 2484259    
Bug Blocks:    

Description OSIDB Bzimport 2026-05-13 18:01:46 UTC
Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.