CVE-2026-23864

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Metareact-server-dom-webpack19.0.0 < 19.0.4affected
Metareact-server-dom-webpack19.1.0 < 19.1.5affected
Metareact-server-dom-webpack19.2.0 < 19.2.4affected
Metareact-server-dom-turbopack19.0.0 < 19.0.4affected
Metareact-server-dom-turbopack19.1.0 < 19.1.5affected
Metareact-server-dom-turbopack19.2.0 < 19.2.4affected
Metareact-server-dom-parcel19.0.0 < 19.0.4affected
Metareact-server-dom-parcel19.1.0 < 19.1.5affected
Metareact-server-dom-parcel19.2.0 < 19.2.4affected

Weaknesses

  • (CWE-502): Deserialization of Untrusted Data. (CWE-400): Uncontrolled Resource Consumption

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

react-server-dom-webpack: react-server-dom-parcel: reactreact-server-dom-turbopack: React Server Components: Denial of Service via specially crafted HTTP requests

Additional References

References