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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-601",
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64645.json",
"unresolved_ranges": [
{
"extracted_events": [
{
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{
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},
{
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}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
}
]
}{
"extracted_events": [
{
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{
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}
],
"source": "CPE_RANGE"
},
{
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{
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},
{
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}
],
"source": "REFERENCES_COMMIT"
},
{
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{
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}
]
}