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Vulnerabilities

Vulnerability · CVE-2026-64647

CVE-2026-64647 is listed by Next.js is a React framework for building full-stack web applications..

Published Jul 27, 2026 · catalog updated Oct 24, 2026 · the affected product

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-64647. EPSS is 0.35%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.35%
Remediation
Version ranges on file
Affected products
cpe vercel/next.js

CVE-2026-64647 is listed by Next.js is a React framework for building full-stack web applications..

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vercel/next.js< 15.5.21
  • cpe vercel/next.js< 16.2.11

How to fix CVE-2026-64647

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-64647. EPSS is 0.35%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with < 15.5.21, < 16.2.11. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-116. EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Next.js security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 27, 2026 · Monitored products — high

    Detected

    CVE-2026-64647 is listed by Next.js is a React framework for building full-stack web applications..

  2. Oct 24, 2026 · Monitored products — high

    Updated

    CVE-2026-64647 is listed by Next.js is a React framework for building full-stack web applications..

Sources

  • CVE.orgVulnerability recordCVE-2026-64647

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-64647

    30-day exploitation probability 0.35%

    first.org
  • Monitored products — highVendor advisoryCVE-2026-64647

    Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST's response body would then leak to unauthorized requests. Though the request itself will not be dedup

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 8, 2026
  • CVE.orgNov 8, 2026
  • Monitored products — highNov 8, 2026