CVE-2026-94482 PUBLISHED

Next.js: Denial of Service in App Router using Server Actions

Assigner: GitHub_M
Reserved: 21.09.2026 Published: 22.10.2026 Updated: 22.10.2026

Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages Router and App Router applications without Server Actions are not affected. This issue is fixed in versions 15.5.28 and 16.4.1.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	vercel
Product	next.js
Versions	Version >= 13.0.0, < 15.5.28 is affected Version >= 16.0.0, < 16.4.1 is affected

References

Problem Types

CWE-770: Allocation of Resources Without Limits or Throttling CWE