Vulnerability Report

CVE-2026-44578

Title: Next.js Server-Side Request Forgery

SSRF

Proof Of Concept

PoC Available for CVE-2026-44578

CWE Category CWE-918
Published Date May 13, 2026
Modified Date Jul 16, 2026
Exploit Status Available
Score 8.6 CVSS v3.1
Exploit Probability (EPSS)
38.87%

Vulnerability Summary

CVE-2026-44578: Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.

Impacted Vendors

V
vercel 1
K
kanopi 1

Reference Links

https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSS v3.1
Source Entity 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-44578 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/panchocosil/verify-ghsa-c4j6-fc7j-m34r
View Code
GitHub https://github.com/tocong282/CVE-2026-44578-PoC
View Code
GitHub https://github.com/love07oj/nextjs-cve-2026-44578
View Code
GitHub https://github.com/dinosn/CVE-2026-44578
View Code
GitHub https://github.com/0xBlackash/CVE-2026-44578
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via 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:C/C:H/I:N/A:N

Affected Stack

No specific products linked.