CVE-2025-55183

FAUCET Score

CVE-2025-55183 is an information leak vulnerability affecting specific configurations of React Server Components (versions 19.0.0-19.2.1), including packages like react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack, impacting products such as Facebook React and Vercel Next.js. A specially crafted HTTP request can cause a vulnerable Server Function to return its source code if it explicitly or implicitly exposes a stringified argument. Rated Medium (CVSS 5.3), this vulnerability has a low attack complexity and requires no user interaction or privileges, potentially leading to unauthorized information disclosure. While not yet in CISA's KEV catalog or having public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered significant community discussion (273 mentions) and media coverage, indicating high awareness and potential for future exploitation.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 15.0.0, < 15.0.7CPE matchmatch criteria	cpe:2.3:a:vercel:next.js::::::node.js::*
		>= 15.1.0, < 15.1.11CPE matchmatch criteria	cpe:2.3:a:vercel:next.js::::::node.js::*
		>= 15.2.0, < 15.2.8CPE matchmatch criteria	cpe:2.3:a:vercel:next.js::::::node.js::*
		>= 15.3.0, < 15.3.8CPE matchmatch criteria	cpe:2.3:a:vercel:next.js::::::node.js::*
		>= 15.4.0, < 15.4.10CPE matchmatch criteria	cpe:2.3:a:vercel:next.js::::::node.js::*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

3.9

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

62.41%

Probability of exploitation in next 30 days

EPSS Percentile

99.1%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.6240 is in the 99th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

npmpatch availablevia ghsa

Product: react-server-dom-parcelFixed in: 19.0.2

npmpatch availablevia ghsa

Product: react-server-dom-turbopackFixed in: 19.0.2

npmpatch availablevia ghsa

Product: react-server-dom-webpackFixed in: 19.0.2

npmpatch availablevia ghsa

Product: react-server-dom-parcelFixed in: 19.1.3

npmpatch availablevia ghsa

Product: react-server-dom-parcelFixed in: 19.2.2

npmpatch availablevia ghsa

Product: react-server-dom-turbopackFixed in: 19.1.3

npmpatch availablevia ghsa

Product: react-server-dom-turbopackFixed in: 19.2.2

npmpatch availablevia ghsa

Product: react-server-dom-webpackFixed in: 19.1.3

npmpatch availablevia ghsa

Product: react-server-dom-webpackFixed in: 19.2.2

Vendor Advisories (2)

npmGHSA-925w-6v3x-g4j4medium

Source Code Exposure Vulnerability in React Server Components

Dec 11, 2025

redhatCVE-2025-55183Moderate

next: React Server Components: Source code exposure through crafted HTTP request

Dec 11, 2025

References

react.dev / blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components

ExploitVendor Advisory

facebook.com / security/advisories/cve-2025-55183

Vendor Advisory