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CVE-2025-55184

HIGHCVSS 7.5/10EPSS 65.59%

Last modified

CVE-2025-55184 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 65.59% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
65.59%

99.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FacebookReact>= 19.0.0, < 19.0.2
FacebookReact>= 19.1.0, < 19.1.3
FacebookReact>= 19.2.0, < 19.2.2
VercelNext.Js>= 13.3.0, < 14.2.35
VercelNext.Js>= 15.0.0, < 15.0.7
VercelNext.Js>= 15.1.0, < 15.1.11
VercelNext.Js>= 15.2.0, < 15.2.8
VercelNext.Js>= 15.3.0, < 15.3.8
VercelNext.Js>= 15.4.0, < 15.4.10
VercelNext.Js>= 15.5.0, < 15.5.9
VercelNext.Js>= 16.0.0, < 16.0.10
VercelNext.Js15.6.0
VercelNext.Js16.1.0

References

Timeline

Published
Last Modified
Status
Modified

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.
How severe is CVE-2025-55184?
CVE-2025-55184 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 65.59% probability of exploitation in the next 30 days.
How do I fix CVE-2025-55184?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-55184?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST