CVE-2025-55183

Name: CVE-2025-55183
Creator: NVD / NIST
Published: 2025-12-11T20:16:00.46+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 62.41%

Last modified Jun 17, 2026

CVE-2025-55183 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An information leak vulnerability exists in specific configurations of 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. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. EPSS estimates a 62.41% chance of exploitation in the next 30 days.

Description

An information leak vulnerability exists in specific configurations of 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. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

62.41%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Vercel	Next.Js	>= 15.0.0, < 15.0.7
Vercel	Next.Js	>= 15.1.0, < 15.1.11
Vercel	Next.Js	>= 15.2.0, < 15.2.8
Vercel	Next.Js	>= 15.3.0, < 15.3.8
Vercel	Next.Js	>= 15.4.0, < 15.4.10
Vercel	Next.Js	>= 15.5.0, < 15.5.9
Vercel	Next.Js	>= 16.0.0, < 16.0.10
Vercel	Next.Js	15.6.0
Vercel	Next.Js	16.1.0
Facebook	React	>= 19.0.0, < 19.0.2
Facebook	React	>= 19.1.0, < 19.1.3
Facebook	React	>= 19.2.0, < 19.2.2

References

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsExploit, Vendor Advisory
https://www.facebook.com/security/advisories/cve-2025-55183Vendor Advisory

Timeline

Published: Dec 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-55183?

How severe is CVE-2025-55183?

CVE-2025-55183 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 62.41% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55183?

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-2025-55183?

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

Scan your code now

Source: NVD / NIST