Vulnerabilities in pkg:npm/react-server-dom-webpack

PACKAGE
Advisory Identifier: GHSA-wx67-qw84-cm4g
Advisory Summary

CVE-2026-44907 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting react-server-dom libraries in the npm ecosystem. The issue involves denial of service in server functions. Remediation is available by upgrading affected packages to version 19.0.8, 19.1.9, 19.2.8.

8 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/react-server-dom-webpack

8 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/react-server-dom-webpack. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-wx67-qw84-cm4g CVE-2026-44907 HIGH react-server-dom: Denial of Service in Server Functions
GHSA-rv78-f8rc-xrxh CVE-2026-23870 HIGH Facebook React has a Denial of Service Vulnerability in React Server Components
GHSA-479c-33wc-g2pg CVE-2026-23869 HIGH React Server Components have a Denial of Service Vulnerability
GHSA-83fc-fqcc-2hmg CVE-2026-23864 HIGH React Server Components have multiple Denial of Service Vulnerabilities
GHSA-7gmr-mq3h-m5h9 CVE-2025-67779 HIGH Denial of Service Vulnerability in React Server Components
GHSA-2m3v-v2m8-q956 CVE-2025-55184 HIGH Denial of Service Vulnerability in React Server Components
GHSA-925w-6v3x-g4j4 CVE-2025-55183 MODERATE Source Code Exposure Vulnerability in React Server Components
GHSA-fv66-9v8q-g76r CVE-2025-55182 CRITICAL React Server Components are Vulnerable to RCE

CVE-2026-44907 at a Glance

CVE Identifier CVE-2026-44907
GHSA Identifier GHSA-wx67-qw84-cm4g
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product react-server-dom
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-44907

To remediate this vulnerability, upgrade all affected react-server-dom dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

react-server-dom-webpack fixed: 19.0.8
npm install react-server-dom-webpack@19.0.8
react-server-dom-turbopack fixed: 19.0.8
npm install react-server-dom-turbopack@19.0.8
react-server-dom-turbopack fixed: 19.1.9
npm install react-server-dom-turbopack@19.1.9
react-server-dom-parcel fixed: 19.1.9
npm install react-server-dom-parcel@19.1.9
react-server-dom-webpack fixed: 19.1.9
npm install react-server-dom-webpack@19.1.9
react-server-dom-turbopack fixed: 19.2.8
npm install react-server-dom-turbopack@19.2.8
react-server-dom-parcel fixed: 19.2.8
npm install react-server-dom-parcel@19.2.8
react-server-dom-webpack fixed: 19.2.8
npm install react-server-dom-webpack@19.2.8
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

npm ls react-server-dom-webpack

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-44907, inspect your project dependencies using npm:

npm ls react-server-dom-webpack

Analyze the terminal output to locate any version of react-server-dom in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 19.0.8), your application is affected.

Note: The npm ls react-server-dom-webpack command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In react-server-dom, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage. We recommend updating immediately. The vulnerability exists in versions 19.0.0 through 19.0.7, 19.1.0 through 19.1.8, and 19.2.0 through 19.2.7 of: - react-server-dom-webpack - react-server-dom-parcel - react-server-dom-turbopack ### Patches Fixes were back ported to versions 19.0.8, 19.1.9, and 19.2.8. If you are using any of the above packages please upgrade to any of the fixed versions immediately. If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.

CVE-2026-44907 Affected react-server-dom Versions

8 component(s)
Fixed Versions:
19.0.819.1.919.2.8
Product / Package Ecosystem Affected Versions Fixed Version
react-server-dom-webpack
npm
≥ 19.0.0
< 19.0.8
19.0.8
react-server-dom-turbopack
npm
≥ 19.0.0
< 19.0.8
19.0.8
react-server-dom-turbopack
npm
≥ 19.1.0
< 19.1.9
19.1.9
react-server-dom-parcel
npm
≥ 19.1.0
< 19.1.9
19.1.9
react-server-dom-webpack
npm
≥ 19.1.0
< 19.1.9
19.1.9
react-server-dom-turbopack
npm
≥ 19.2.0
< 19.2.8
19.2.8
react-server-dom-parcel
npm
≥ 19.2.0
< 19.2.8
19.2.8
react-server-dom-webpack
npm
≥ 19.2.0
< 19.2.8
19.2.8

References

Frequently Asked Questions

What is CVE-2026-44907?
CVE-2026-44907 is a security vulnerability in react-server-dom involving Denial of Service in Server Functions under CWE-400: Uncontrolled Resource Consumption.
Which react-server-dom versions are affected?
Affected versions include releases prior to 19.0.8, 19.1.9, 19.2.8 across affected packages: react-server-dom-webpack, react-server-dom-turbopack, react-server-dom-parcel.
What version fixes CVE-2026-44907?
Upgrading to 19.0.8, 19.1.9, 19.2.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is react-server-dom-webpack affected?
Yes, react-server-dom-webpack is affected in releases prior to 19.0.8, 19.1.9, 19.2.8. Upgrade your dependency to 19.0.8, 19.1.9, 19.2.8 or later.
Is react-server-dom-turbopack affected?
Yes, react-server-dom-turbopack is affected in releases prior to 19.0.8, 19.1.9, 19.2.8. Upgrade your dependency to 19.0.8, 19.1.9, 19.2.8 or later.
What is the CVSS score of CVE-2026-44907?
CVE-2026-44907 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-44907?
CVE-2026-44907 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2026-44907?
Run the dependency tree command: 'npm ls react-server-dom-webpack'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wx67-qw84-cm4g",
  "modified" : "2026-07-24T21:12:02Z",
  "published" : "2026-07-24T21:12:02Z",
  "aliases" : [ "CVE-2026-44907" ],
  "summary" : "react-server-dom: Denial of Service in Server Functions",
  "details" : "### Impact\n\nA denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage.\n\nWe recommend updating immediately.\n\nThe vulnerability exists in versions 19.0.0 through 19.0.7, 19.1.0 through 19.1.8, and 19.2.0 through 19.2.7 of:\n- react-server-dom-webpack\n- react-server-dom-parcel\n- react-server-dom-turbopack\n\n### Patches\n\nFixes were back ported to versions 19.0.8, 19.1.9, and 19.2.8.\n\nIf you are using any of the above packages please upgrade to any of the fixed versions immediately.\n\nIf your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
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    "package" : {
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  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/react/react/security/advisories/GHSA-wx67-qw84-cm4g"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44907"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/react/react"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-24T21:12:02Z",
    "nvd_published_at" : "2026-07-21T17:17:08Z"
  }
}