# CVE-2026-64641

## Summary

- **CVE ID:** CVE-2026-64641
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-834
- **Published:** Jul 27, 2026
- **Last Modified:** Jul 27, 2026

## 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.

## Affected Products

- vercel — next.js (>= 13.0.0, < 15.5.21)
- vercel — next.js (>= 16.0.0, < 16.2.11)

## References

- [CNA](https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfj)
- [CNA](https://github.com/vercel/next.js/pull/96013)
- [CNA](https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12)
- [CNA](https://github.com/vercel/next.js/releases/tag/v15.5.21)
- [CNA](https://github.com/vercel/next.js/releases/tag/v16.2.11)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.05%
- **EPSS Percentile:** 62.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._