VulnerabilityAnalyzed

CVE-2026-64646

Next.js is a React framework for building full-stack web applications.

MEDIUM 6.3EPSS 0.53%

Does this matter?

Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.

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, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11.

CVSS 4.0: 6.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.53% probability · 43th percentile
CISA KEV: Not listed
Weakness: CWE-770
Affected: vercel/next.js
Source: security-advisories@github.com

References

https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4Patch
https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17Patch
https://github.com/vercel/next.js/releases/tag/v15.5.21Product, Release Notes
https://github.com/vercel/next.js/releases/tag/v16.2.11Product, Release Notes
https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.