Vulnerability Report

CVE-2025-67779

Title: Vercel Next.Js Denial of Service (DoS)

DoS

Proof Of Concept

PoC Available for CVE-2025-67779

CWE Category CWE-400
Published Date Dec 12, 2025
Modified Date Dec 12, 2025
Exploit Status Available
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
19.15%

Vulnerability Summary

CVE-2025-67779: It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

Impacted Vendors

V
vercel 1
K
kanopi 1
Z
zeit 1
F
facebook 1

Reference Links

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components https://www.facebook.com/security/advisories/cve-2025-67779
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-67779 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/williavs/nextjs-security-update
View Code
MODIFIED

Vulnerability data or affected products updated.

MODIFIED

Vulnerability data updated via NVD.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.