CVE-2026-64646CWE-770

Next.js: Unbounded Server Action payload in Edge runtime

Medium · published July 27, 2026

CVSS v4.0
6.3
EPSS
1%
Percentile
43.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00524 · 43.6th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-27T18:54Z
EPSS history
Timeline
  • 27 JUL 18:54Z
    Next.js: Unbounded Server Action payload in Edge runtime
    cvelistv5