Next.js 15.x/16.x Connection Exhaustion via Partial Cache Components
CVE-2026-44579 Published on May 13, 2026

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

NVD

Vulnerability Analysis

CVE-2026-44579 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Types

Allocation of Resources Without Limits or Throttling

The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

Deadlock

The software contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock.


Products Associated with CVE-2026-44579

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-44579 are published in these products:

Vercel Next Js
 
Red Hat Enterprise Linux Ai
 
Red Hat Trusted Artifact Signer
 
Red Hat Amq Streams
 
Red Hat Enterprise Linux (RHEL)
 

Affected Versions

vercel next.js: Red Hat Enterprise Linux AI (RHEL AI) 3: Red Hat Trusted Artifact Signer: Red Hat streams for Apache Kafka 2: Red Hat streams for Apache Kafka 3: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9:

Exploit Probability

EPSS
0.46%
Percentile
36.44%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.