Excessive CPU Consumption Vulnerability in Next.js Framework by Vercel
CVE-2026-94482

8.2HIGH

Key Information:

Vendor

Vercel
Status
Next.js
Vendor
CVE Published:
22 October 2026

What is CVE-2026-94482?

Next.js, a well-known React framework for building full-stack web applications, is susceptible to a performance vulnerability that can lead to excessive CPU consumption. This issue arises when crafted requests are made targeting App Router applications that incorporate at least one Server Action. Such requests can block the processing of subsequent requests, leading to performance degradation and potential service disruptions. Notably, applications utilizing the Pages Router or those without Server Actions remain unaffected by this vulnerability. The problem has been addressed in versions 15.5.28 and 16.4.1 of Next.js, and users are encouraged to update to these versions to mitigate risks.

Affected Version(s)

next.js >= 13.0.0, < 15.5.28 < 13.0.0, 15.5.28

next.js >= 16.0.0, < 16.4.1 < 16.0.0, 16.4.1

References

https://github.com/vercel/next.js/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/vercel/next.js/releases/tag/v15.5.28
x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v16.4.1
x_refsource_MISC

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.