Vulnerability Intelligence Report
CVE-2026-23869
A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:1.55%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
—
Weaknesses (CWE)
CWE-502 ↗(CWE-502) Deserialization of Untrusted Data, (CWE-400) Uncontrolled Resource Consumption
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Meta | react-server-dom-turbopack | 19.0.0 <= 19.0.4 (affected), 19.1.0 <= 19.1.5 (affected), 19.2.0 <= 19.2.4 (affected) |
| Meta | react-server-dom-parcel | 19.0.0 <= 19.0.4 (affected), 19.1.0 <= 19.1.5 (affected), 19.2.0 <= 19.2.4 (affected) |
| Meta | react-server-dom-webpack | 19.0.0 <= 19.0.4 (affected), 19.1.0 <= 19.1.5 (affected), 19.2.0 <= 19.2.4 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
1.551%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Meta Platforms, Inc. · Vendor · USA |
| Reserved | 2026-01-16T19:49:26 |
| Published | 2026-04-08T19:11:08 |
| Last Updated | 2026-07-15T01:17:57 |
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