CVE-2026-64641
HIGH severity · CVSS 7.5 · CWE-834
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12 ↗
Additional information
- NVD record
- https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12Patch
- https://github.com/vercel/next.js/pull/96013Patch
- https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfjAdvisory
- https://github.com/vercel/next.js/releases/tag/v15.5.21
- https://github.com/vercel/next.js/releases/tag/v16.2.11