CVE-2026-64641
Next.js is a React framework for building full-stack web applications.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 4.0
- 8.2 HIGHCVSS: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/M
- EPSS
- 0.86% probability · 58th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-834
- Affected
- vercel/next.js
- Source
- security-advisories@github.com
EPSS 0.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12Patch
- https://github.com/vercel/next.js/pull/96013Issue Tracking, Patch
- https://github.com/vercel/next.js/releases/tag/v15.5.21Product, Release Notes
- https://github.com/vercel/next.js/releases/tag/v16.2.11Product, Release Notes
- https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfjVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.