CVE-2026-64645
Published:July 27, 2026
Updated:August 04, 2026
Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a
rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of the rule's hostname suffix. For a rewrite, Next.js proxies the request to that arbitrary host and serves the response from the application's origin, leading to Server-Side Request forgery. A redirects() rule configured this way is vulnerable to an Open Redirect. This issue has been fixed in versions 15.5.21 and 16.2.11.
Affected Packages
https://github.com/vercel/next.js.git (GITHUB):
Affected version(s) >=v16.0.0 <v16.2.11Fix Suggestion:
Update to version v16.2.11https://github.com/vercel/next.js.git (GITHUB):
Affected version(s) >=v12.0.0 <v15.5.21Fix Suggestion:
Update to version v15.5.21next (NPM):
Affected version(s) >=16.0.0 <16.2.11Fix Suggestion:
Update to version 16.2.11next (NPM):
Affected version(s) >=12.0.0 <15.5.21Fix Suggestion:
Update to version 15.5.21Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.78