Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.
Weakness
The product requires authentication, but the product has an alternate path or channel that does not require authentication.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Next.js | Vercel | 15.2.0 (including) | 15.5.18 (excluding) |
| Next.js | Vercel | 16.0.0 (including) | 16.2.6 (excluding) |
| Streams for Apache Kafka 2.9.4 | RedHat | next | * |
| Red Hat Trusted Artifact Signer 1.4 | RedHat | rhtas/rekor-search-ui-rhel9:1783327185 | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:37272
- https://access.redhat.com/security/cve/CVE-2026-45109
- https://bugzilla.redhat.com/show_bug.cgi?id=2477190
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.json