CVE-2026-23870
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Denial of Service in React Server DOM Packages

Vulnerability report for CVE-2026-23870, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-05-06

Last updated on: 2026-05-06

Assigner: Facebook, Inc.

Description

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-05-06
Last Modified
2026-05-06
Generated
2026-07-06
AI Q&A
2026-05-06
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

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Executive Summary

This vulnerability is a denial of service (DoS) issue that can be triggered by sending specially crafted HTTP requests to certain server function endpoints.

When exploited, it can cause the server to crash, throw out-of-memory exceptions, or experience excessive CPU usage.

It affects specific versions of the packages react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack.

Impact Analysis

The impact of this vulnerability is primarily a denial of service condition.

An attacker could cause your server to crash or become unresponsive by sending malicious HTTP requests.

This could lead to service outages, degraded performance due to high CPU usage, or resource exhaustion from out-of-memory errors.

Compliance Impact

The vulnerability described is a denial of service issue that can cause server crashes, out-of-memory exceptions, or excessive CPU usage. It does not directly impact confidentiality or integrity of data.

Since the vulnerability does not involve unauthorized access to or disclosure of personal or sensitive data, it does not directly affect compliance with standards such as GDPR or HIPAA, which primarily focus on data protection and privacy.

However, denial of service incidents can indirectly affect availability requirements under these regulations, as they may disrupt service availability and access to data.

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