8.2

CVE-2026-64641: vercel next.js Excessive Iteration

CVSS: 8.2v4.0HighAnalyzed
AliasesCGA-3849-p36f-g3w7CGA-fvgm-pmc3-m8xmCGA-fw73-x94r-2j2c
Published 27-07-2026Last modified 27-07-2026
Open JSON

Vulnerability summary

CVE-2026-64641 is a high (CVSS 8.2) Excessive Iteration vulnerability in vercel next.js. EPSS estimates a 0.86% chance of exploitation in the next 30 days, higher than 57.7% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v4.0 (CVE.org)
EPSS score
0.86%
0%100%
Low · -0.52 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-2638-M5R6-7WWX

Timeline

  1. 27-07-2026
    PublishedVulnerability first disclosed.
  2. 27-07-2026
    Last modifiedVulnerability information updated.

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, crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. This issue has been fixed in versions 15.5.21 and 16.2.11.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.86%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

-0.52 pp

From 1.38% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.86%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard14 products
  • cadence-webAll versions (No fix recorded)
  • commercial-chainloop-frontendAll versions (No fix recorded)
  • homepage< 1.13.2-r8 | < 1.13.2-r9
  • jitsucom-jitsu-console< 2.11.0-r30
  • keep-ui< 0.54.2-r1
Wolfi4 products
  • jitsucom-jitsu-console< 2.11.0-r30
  • langfuse-3< 3.224.1-r0
  • langfuse-3-compat< 3.225.7-r6
  • langfuse-3-worker< 3.224.1-r0
Npm1 product
  • next≥ 13.0.0, < 15.5.21 | ≥ 16.0.0, < 16.2.11
Vercel1 product
  • next.js≥ 13.0.0, < 15.5.21 | ≥ 16.0.0, < 16.2.11

4 vendors · 20 products

References

8 links