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Description

Next.js is a React framework for building full-stack web applications. From to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-13 | Updated 2026-05-14 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

>= 16.0.0, < 16.2.5
affected

>= 15.0.0, < 15.5.16
affected

References

github.com/...ext.js/security/advisories/GHSA-mg66-mrh9-m8jx

cve.org (CVE-2026-44579)

nvd.nist.gov (CVE-2026-44579)

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