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).
Published: 2026-05-06
Score: 7.5 High
EPSS: 1.5% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A denial of service vulnerability allows an attacker to trigger server crashes, out‑of‑memory exceptions, or excessive CPU usage by sending specially crafted HTTP requests to server function endpoints. The impact is a loss of availability for the affected application.

Affected Systems

The vulnerability affects Meta’s React Server DOM packages: react‑server‑dom‑webpack, react‑server‑dom‑parcel, and react‑server‑dom‑turbopack. The affected versions are 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5.

Risk and Exploitability

The CVSS score of 7.5 indicates a high severity denial of service. The EPSS score of 2% indicates a low exploitation probability, and the issue is not listed in CISA’s KEV catalog. Based on the description, it is inferred that the vulnerability can be exploited remotely without authentication by sending crafted HTTP requests to exposed server function endpoints. The lack of mitigation measures in the affected releases means a successful attack would result in resource exhaustion and service interruption.

Generated by OpenCVE AI on June 18, 2026 at 14:42 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest patch by upgrading the react-server-dom packages to a version newer than 19.2.5, as released after the advisory.
  • Remove the vulnerable versions of react‑server‑dom‑webpack, react‑server‑dom‑parcel, and react‑server‑dom‑turbopack from the project’s package.json.
  • Reinstall the libraries with the most recent stable releases documented on the official npm registry.
  • Implement application‑level request throttling or rate‑limiting on server function endpoints to mitigate the effect of any future denial‑of‑service attempts.
  • Monitor server resource usage and error logs for signs of abnormal CPU or memory consumption that could indicate an attempted exploit.

Generated by OpenCVE AI on June 18, 2026 at 14:42 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-rv78-f8rc-xrxh Facebook React has a Denial of Service Vulnerability in React Server Components
History

Thu, 18 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted HTTP Requests in Meta’s React Server DOM Packages
Weaknesses CWE-400

Tue, 16 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted HTTP Requests in Meta React Server DOM Packages
Weaknesses CWE-770

Thu, 07 May 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Facebook
Facebook react-server-dom-parcel
Facebook react-server-dom-turbopack
Facebook react-server-dom-webpack
Vendors & Products Facebook
Facebook react-server-dom-parcel
Facebook react-server-dom-turbopack
Facebook react-server-dom-webpack

Wed, 06 May 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 06 May 2026 17:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted HTTP Requests in Meta React Server DOM Packages
Weaknesses CWE-770

Wed, 06 May 2026 16:45:00 +0000

Type Values Removed Values Added
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).
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Facebook React-server-dom-parcel React-server-dom-turbopack React-server-dom-webpack
cve-icon MITRE

Status: PUBLISHED

Assigner: Meta

Published:

Updated: 2026-05-06T19:06:00.435Z

Reserved: 2026-01-16T19:49:26.309Z

Link: CVE-2026-23870

cve-icon Vulnrichment

Updated: 2026-05-06T19:05:53.869Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-06T17:16:22.043

Modified: 2026-06-17T10:22:14.020

Link: CVE-2026-23870

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-18T14:45:11Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption