Bug 2507643 (CVE-2026-64646)

Summary: CVE-2026-64646 next: Next.js: Denial of Service via excessive memory consumption in Server Actions
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, jhorak, kaycoth, lball, mvyas, ngough, rgodfrey, rhel-process-autobot, swoodman, 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. An attacker sending specially crafted requests to a Next.js application utilizing the App Router with Server Actions configured to use the Edge runtime can cause excessive memory consumption. This can lead to a denial of service (DoS) due to resource exhaustion.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-27 20:01:46 UTC
Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11.