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 deduped. This is only an issue when receiving request bodies with a content type charset other than UTF-8. For example, the UTF-16 byte sequences for 삃삃 and 섄섄 in the request body would share the same cache. This issue has been fixed in versions 15.5.21 and 16.2.11.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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 deduped. This is only an     issue when receiving request bodies with a content type charset other than UTF-8. For example, the UTF-16     byte sequences for  and  in the request body would share the same cache. This issue has been fixed in     versions 15.5.21 and 16.2.11. (CVE-2026-64647)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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 deduped. This is only an
    issue when receiving request bodies with a content type charset other than UTF-8. For example, the UTF-16
    byte sequences for 삃삃 and 섄섄 in the request body would share the same cache. This issue has been fixed in
    versions 15.5.21 and 16.2.11. (CVE-2026-64647)

ID	Name	Product	Family	Type	Severity
330672	Linux Distros Unpatched Vulnerability : CVE-2026-64647	Nessus	Misc.	Local	medium
445134	SCA: security update for next (GHSA-4633-3j49-mh5q)	Tenable Cloud Security	SCA Checks	Local	medium
445134	SCA: security update for next (GHSA-4633-3j49-mh5q)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-64647

medium

Tenable Plugins

medium

medium

medium