High 7.5Published Dec 11, 2025

CVE-2025-55184A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-serve…

Updated under an hour ago (2026-10-19 10:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

facebook react facebook:react	from 19.0.0 before 19.0.2; from 19.1.0 before 19.1.3; from 19.2.0 before 19.2.2	NVD
vercel next.js vercel:next.js	from 13.3.0 before 14.2.35; from 15.0.0 before 15.0.7; from 15.1.0 before 15.1.11; from 15.2.0 before 15.2.8; from 15.3.0 before 15.3.8; from 15.4.0 before 15.4.10; from 15.5.0 before 15.5.9; from 16.0.0 before 16.0.10; and 81 more ranges	NVD

References

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsvendor-advisory
https://www.facebook.com/security/advisories/cve-2025-55184vendor-advisory
https://github.com/KingHacker353/CVE-2025-55184

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.