CVE-2025-55184

HIGH
Published Dec 11, 2025 Modified Dec 15, 2025 CWE-502

Description

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 v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-502 Deserialization of Untrusted Data

Affected Products

Vendor Product
facebook react
facebook react
facebook react
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js

References

Frequently Asked Questions

What is CVE-2025-55184? +
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. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-55184? +
CVE-2025-55184 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-55184? +
CVE-2025-55184 affects products from facebook, vercel, specifically: next.js, react. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-55184? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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