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CVE-2026-64645

HIGH
8.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-64645
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-20 17:11 UTC
Published
2026-07-27 17:37 UTC
Last updated
2026-07-28 14:02 UTC
Primary CWE
CWE-918
CWE-918: Server-Side Request Forgery (SSRF)
Vendor / Product
vercel / next.js
Sources
cve.org  ·  NVD

Severity & Metrics

8.3 HIGH CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
vercel next.js — >= 12.0.0 < 15.5.21, >= 16.0.0, < 16.2.11
Weakness (CWE)
CWESourceDescription
CWE-601 cna CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
CWE-918 cna CWE-918: Server-Side Request Forgery (SSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.3 HIGH 4.0 cna 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
References (5)
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