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Vulnerabilities CVE-2026-64645

CVE-2026-64645

High
Open
TLP:CLEAR

Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname

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Description

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.

Details

CVSS Score
8.3
EPSS Score
0.78%

53th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N
Confidence
90%
Published
Jul 27, 2026
Last Modified
Jul 28, 2026
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