High severity · published May 6, 2026
CVE-2026-23870
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…
7.5
CVSS
1.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
react-server-dom-parcel · Meta
19.0.0 through 19.0.5; 19.1.0 through 19.1.6; 19.2.0 through 19.2.5 · source: vendor, NVD
RE
react-server-dom-turbopack · Meta
19.0.0 through 19.0.5; 19.1.0 through 19.1.6; 19.2.0 through 19.2.5 · source: vendor, NVD
RE
react-server-dom-webpack · Meta
19.0.0 through 19.0.5; 19.1.0 through 19.1.6; 19.2.0 through 19.2.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23870
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23870
Vendor Advisory
https://github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxh
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