6.3

CVE-2026-64644: vercel next.js Inefficient Algorithmic Complexity

CVSS: 6.3v4.0MediumAnalyzed
AliasesCGA-327q-crpc-p3mmCGA-8p5w-jxmp-5hhmCGA-gmx9-mqpg-9mrp
Published 27-07-2026Last modified 27-07-2026
Open JSON

Vulnerability summary

CVE-2026-64644 is a medium (CVSS 6.3) Inefficient Algorithmic Complexity vulnerability in vercel next.js. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 50.9% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.67%
0%100%
Low · -0.01 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-JMHM-6G66-GJWF

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 15.5.0 through 15.5.20 and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely hosted images if configured (not enabled by default). If those images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only config.images.remotePatterns is affected, and just the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. 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

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

-0.01 pp

From 0.68% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.67%

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

Chainguard13 products
  • commercial-chainloop-frontendAll versions (No fix recorded)
  • homepage< 1.13.2-r9 | < 1.13.2-r8
  • jitsucom-jitsu-console< 2.11.0-r30
  • keep-ui< 0.54.2-r1
  • keep-ui-fips< 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≥ 15.5.0, < 15.5.21 | ≥ 16.0.0, < 16.2.11
Vercel1 product
  • next.js≥ 15.5.0, < 15.5.21 | ≥ 16.0.0, < 16.2.11

4 vendors · 19 products

References

8 links