Bug 2507613 (CVE-2026-64641)

Summary: CVE-2026-64641 next: Next.js: Denial of Service via crafted requests to App Router with 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: aazores, abrianik, akostadi, amasferr, amctagga, ant, anujha, aoconnor, aschwart, asoldano, aszczucz, ataylor, avibelli, bbaranow, bbrownin, bgeorges, bmaxwell, bniver, boliveir, bstansbe, cescoffi, chfoley, cmah, dandread, dbruscin, dkreling, dlofthou, dmayorov, drichtar, eaguilar, ebaron, eborisov, ehugonne, ewittman, flucifre, fmariani, fmongiar, ggrzybek, gmalinko, gmeno, gotiwari, groman, gsmet, istudens, ivassile, iweiss, janstey, jhorak, jlledo, jmartisk, jmatsuok, jnethert, jraez, jtolenti, jwon, kaycoth, kvanderr, lball, lthon, manderse, mbenjamin, mcarlett, mhackett, mosmerov, mposolda, msvehla, mvyas, ngough, nipatil, nwallace, olubyans, pantinor, parichar, pberan, pesilva, pgallagh, pjindal, pmackay, probinso, rgodfrey, rguimara, rhel-process-autobot, rkubis, rmartinc, rruss, rstancel, rstepani, rsvoboda, sbiarozk, sostapov, ssilvert, sthorger, swoodman, tasato, tcunning, thjenkin, tqvarnst, tsedmik, vdosoudi, vereddy, veshanka, vmuzikar, watson-tool-maintainers, yfang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Next.js, a React framework for building web applications. A remote attacker can send specially crafted requests to Next.js applications that utilize the App Router with Server Actions. This can lead to excessive CPU usage, causing the application to become unresponsive and preventing it from processing further requests, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-27 19:02:18 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, crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. This issue has been fixed in versions 15.5.21 and 16.2.11.