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Vulnerabilities CVE-2026-44579

CVE-2026-44579

High
Open
TLP:CLEAR

Next.js: Denial of Service via connection exhaustion in applications using Cache Components

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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.

Details

CVSS Score
7.5
EPSS Score
0.71%

50.3th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
May 13, 2026
Last Modified
Aug 13, 2026
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