Home/CVE/An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 1
CVE

CVE-2025-55183

An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 1

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.

MEDIUM · CVSS 5.3 EPSS 0.26306
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 4% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
▤

Affected Products & Versions

11
facebook react>= 19.0.0 and < 19.0.2
facebook react>= 19.1.0 and < 19.1.3
facebook react>= 19.2.0 and < 19.2.2
vercel next.js>= 15.0.0 and < 15.0.7
vercel next.js>= 15.1.0 and < 15.1.11
vercel next.js>= 15.2.0 and < 15.2.8
vercel next.js>= 15.3.0 and < 15.3.8
vercel next.js>= 15.4.0 and < 15.4.10
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm react-server-dom-parcel MODERATE fixed in 19.0.2
npm react-server-dom-turbopack MODERATE fixed in 19.0.2
npm react-server-dom-webpack MODERATE fixed in 19.0.2
⚠

Public Exploits & PoCs

2
nucleiReact Server Components - Denial of Servicehigh
pocreact.dev · denial-of-service-and-source-code-exposure-in-react-serve...react.dev
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cve-assign@fb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Dec 2025 · 08:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
oracle-cpuoracle-cpu-Oracle-Database-Oracle-REST-Data-Services-9456--CVE-2025-55183
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.facebook.com/security/advisories/cve-2025-55183Vendor Advisory
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