CVE-2026-23864
"React Server Components Denial of Service Vulnerabilities"
Description
Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.
INFO
Published Date :
Jan. 26, 2026, 8:16 p.m.
Last Modified :
Feb. 13, 2026, 3:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade react-server-dom-parcel to the latest version.
- Upgrade react-server-dom-turbopack to the latest version.
- Upgrade react-server-dom-webpack to the latest version.
Public PoC/Exploit Available at Github
CVE-2026-23864 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-23864.
| URL | Resource |
|---|---|
| https://www.facebook.com/security/advisories/cve-2026-23864 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23864 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-23864
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Multi-tenant SaaS platform for a commercial loan broker. Referral partners (realtors, loan officers) submit commercial loan deals through a portal. The broker (Admin) manages the full deal pipeline. Borrowers get view-only access to their loan status.
JavaScript TypeScript CSS Dockerfile
None
JavaScript TypeScript Sass Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23864 vulnerability anywhere in the article.
-
CybersecurityNews
Multiple Vulnerabilities in React Server Components Enable DoS Attacks
Multiple critical security vulnerabilities have recently been disclosed in React Server Components, enabling threat actors to launch Denial-of-Service (DoS) attacks against vulnerable servers. The fla ... Read more
-
Daily CyberSecurity
CVSS 9.8 Sandbox Escape: Critical vm2 Flaw Exposes Millions of Apps
A critical security vulnerability has been unearthed in vm2, a highly popular sandbox library for Node.js used by millions of developers to run untrusted code. Tracked as CVE-2026-22709, the flaw carr ... Read more
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Daily CyberSecurity
Incomplete Fix: High-Severity React Server Components DoS Flaw (CVE-2026-23864)
The team behind React, the JavaScript library that powers a vast swath of the modern web, has issued an urgent security advisory warning that previous attempts to patch a Denial of Service (DoS) vulne ... Read more
-
Daily CyberSecurity
High-Severity Flaw in Western Digital Installer Opens Door to Code Execution
Western Digital, a titan in the data storage industry, has rolled out a critical update for its widely used WD Discovery software after security researchers uncovered a dangerous flaw in its installer ... Read more
The following table lists the changes that have been made to the
CVE-2026-23864 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:facebook:react:*:*:*:*:*:*:*:* versions from (including) 19.0.0 up to (excluding) 19.0.4 *cpe:2.3:a:facebook:react:*:*:*:*:*:*:*:* versions from (including) 19.1.0 up to (excluding) 19.1.5 *cpe:2.3:a:facebook:react:*:*:*:*:*:*:*:* versions from (including) 19.2.0 up to (excluding) 19.2.4 Added Reference Type Facebook, Inc.: https://www.facebook.com/security/advisories/cve-2026-23864 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added CWE CWE-502 -
New CVE Received by [email protected]
Jan. 26, 2026
Action Type Old Value New Value Added Description Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components. Added Reference https://www.facebook.com/security/advisories/cve-2026-23864