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CVE-2026-45109 Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes

🗓️ 13 May 2026 17:11:07Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 94 Views

Next.js middleware bypass in App Router via segment-prefetch routes; fix applied in version 15.5.18 and 16.2.6.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
Next.js Authentication Bypass
8 Jun 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-45109 vulnerabilities
13 May 202601:17
–cgr
cnnvd
CNNVD
Next.js security vulnerabilities
13 May 202600:00
–cnnvd
cve
CVE
CVE-2026-45109
13 May 202617:11
–cve
github
Github Security Blog
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
11 May 202616:21
–github
mend
Mend
CVE-2026-45109
13 May 202617:11
–mend
nvd
NVD
CVE-2026-45109
13 May 202618:16
–nvd
osv_cga
osv_cga
CGA-7HV9-J3QX-JQRW
13 May 202600:18
–osv_cga
osv_cga
osv_cga
CGA-C7FX-2VXJ-55JR
13 May 202600:44
–osv_cga
osv_cga
osv_cga
CGA-FHH5-8WHX-GGX8
12 May 202612:03
–osv_cga
Rows per page
[
  {
    "vendor": "vercel",
    "product": "next.js",
    "versions": [
      {
        "version": ">= 15.2.0, < 15.5.17",
        "status": "affected"
      },
      {
        "version": ">= 16.0.0, < 16.2.6",
        "status": "affected"
      }
    ]
  }
]

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