CVE-2026-64641

highpriority · track · 30EPSS 0.009 · 58 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.86% (58th) EPSS

CVSS 7.5 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

enisa_euvd · cert_bund · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · security-advisories@github.com

v4.04.6mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-834USCWE-834US

affected products (10)

Products and version ranges known to be affected.

IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
vercel next.js< 15.5.21cert_bundDE
vercel next.js< 16.2.11cert_bundDE
vercel next.js13.0.0, → 15.5.21enisa_euvdEU
vercel next.js16.0.0, → 16.2.11enisa_euvdEU
vercel next.js13.0.0 → 15.5.21nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
vercel next.js16.0.0 → 16.2.11nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
npm next13.0.0 → 15.5.21osvUSpkg:npm/next
npm next16.0.0 → 16.2.11osvUSpkg:npm/next

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2468Vercel Next.js: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Vercel Next.js ausnutzen, um Daten zu manipulieren, um Informationen offenzulegen, um einen Denial of Service Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
GHSA-m99w-x7hq-7vfjNext.js: Denial of Service in App Router using Server Actions2026-07-22ghsa · osvUS
## Impact 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. ## Workarounds No workaround exists besides upgrading. Applications using Pages Router or not using Server Actions are not vulnerable.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-07-27modified 2026-10-24

references (10)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan