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Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
Affected packages
- next
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6
- https://nvd.nist.gov/vuln/detail/CVE-2026-45109
- https://github.com/vercel/next.js
- https://github.com/vercel/next.js/releases/tag/v15.5.18
- https://github.com/vercel/next.js/releases/tag/v16.2.6
Structured record: https://osv.dev/vulnerability/GHSA-26hh-7cqf-hhc6
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→Vercel — Ship a patched app with zero-config deployment.→
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