Medium severity · published Dec 11, 2025
CVE-2025-55183
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…
5.3
CVSS
64.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)64.2% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
react-server-dom-parcel · Meta
19.0.0 through 19.0.1; 19.1.0 through 19.1.2; 19.2.0 through 19.2.1 · source: vendor
RE
react-server-dom-turbopack · Meta
19.0.0 through 19.0.1; 19.1.0 through 19.1.2; 19.2.0 through 19.2.1 · source: vendor
RE
react-server-dom-webpack · Meta
19.0.0 through 19.0.1; 19.1.0 through 19.1.2; 19.2.0 through 19.2.1 · source: vendor
NE
Next.js · Vercel
15.0.0 before 15.0.7; 15.1.0 before 15.1.11; 15.2.0 before 15.2.8; 15.3.0 before 15.3.8; 15.4.0 before 15.4.10; 15.5.0 before 15.5.9; +34 more · source: NVD
RE
React · Facebook
19.0.0 before 19.0.2; 19.1.0 before 19.1.3; 19.2.0 before 19.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55183
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55183
Exploit
https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components
Vendor Advisory
https://www.facebook.com/security/advisories/cve-2025-55183
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