What is CVE-2026-44907?

CVE-2026-44907 is a high-severity vulnerability in Meta React-Server-Dom-Parcel, classified under CWE-502, CWE-400. CVSS score: 7.5/10. Published 2026-07-21.

How severe is CVE-2026-44907?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Meta React-Server-Dom-Parcel

CVE-2026-44907

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.7, 19.1.0 through 19.1.8, and 19.2.0 through 19.2.7).

EPSS: 0.006 (46.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Meta React-server-dom-parcel — versions 19.0.0, 19.1.0, 19.2.0
Meta React-server-dom-turbopack — versions 19.0.0, 19.1.0, 19.2.0
Meta React-server-dom-webpack — versions 19.0.0, 19.1.0, 19.2.0

References

cve-assign@fb.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44907?: CVE-2026-44907 is a high-severity vulnerability in Meta React-Server-Dom-Parcel, classified under CWE-502, CWE-400. CVSS score: 7.5/10. Published 2026-07-21.
How severe is CVE-2026-44907?: High severity. CVSS v3 base score is 7.5 out of 10.