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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-m99w-x7hq-7vfj | Next.js: Denial of Service in App Router using Server Actions |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 28 Jul 2026 03:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Vercel
Vercel next.js |
|
| Vendors & Products |
Vercel
Vercel next.js |
Mon, 27 Jul 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Next.js: Denial of Service in App Router using Server Actions | |
| Weaknesses | CWE-834 | |
| References |
|
|
| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-27T18:54:59.134Z
Reserved: 2026-07-20T17:11:30.895Z
Link: CVE-2026-64641
Updated: 2026-07-27T18:54:55.826Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-28T02:45:16Z
Weaknesses
Github GHSA