GitHub Advisoryadvisory · npm

GHSA-q4gf-8mx6-v5v3 Next.js has a Denial of Service with Server Components

HIGH Published 2026-04-10 Modified 2026-04-10 Official page ↗
Ecosystem
npm
Packages
next
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-770
Reviewed
2026-04-10

Affected packages

• npm next: >= 13.0.0, < 15.5.15 → fixed in 15.5.15 • npm next: >= 16.0.0-beta.0, < 16.2.3 → fixed in 16.2.3

Description

A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23869. You can read more about this advisory our this changelog. A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage. This can result in denial of service in unpatched environments.

Related

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References