CVE-2026-23870: facebook react-server-dom-parcel Uncontrolled Resource Consumption
Vulnerability summary
CVE-2026-23870 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in facebook react-server-dom-parcel. EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.4% of scored vulnerabilities.
Timeline
- 06-05-2026PublishedVulnerability first disclosed.
- 06-05-2026Last modifiedVulnerability information updated.
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 metrics
3 scores · 3 sources · 1 version- OSV · NpmEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.53%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
0.00 pp
From 1.53% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Facebook3 products
- react-server-dom-parcel≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
- react-server-dom-turbopack≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
- react-server-dom-webpack≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
Meta3 products
- react-server-dom-parcel≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
- react-server-dom-turbopack≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
- react-server-dom-webpack≥ 19.0.0, ≤ 19.0.5 | ≥ 19.1.0, ≤ 19.1.6 | ≥ 19.2.0, ≤ 19.2.5
Npm3 products
- react-server-dom-parcel≥ 19.0.0, < 19.0.6 | ≥ 19.1.0, < 19.1.7 | ≥ 19.2.0, < 19.2.6
- react-server-dom-turbopack≥ 19.0.0, < 19.0.6 | ≥ 19.1.0, < 19.1.7 | ≥ 19.2.0, < 19.2.6
- react-server-dom-webpack≥ 19.0.0, < 19.0.6 | ≥ 19.1.0, < 19.1.7 | ≥ 19.2.0, < 19.2.6
3 vendors · 9 products
References
5 links- github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxhX Refsource CONFIRMWEBVendor Advisory
- github.com/facebook/reactPACKAGE