# CVE-2026-44574: Next.js: Middleware / Proxy bypass through dynamic route parameter injection

> CVE-2026-44574: Next.js: Middleware / Proxy bypass through dynamic route parameter injection. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-44574
Last updated: 2026-08-13T13:19:03Z

- Published: 2026-05-13 16:56 UTC · Updated: 2026-08-13 13:19 UTC · Assigner: GitHub\_M
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.64%, 50th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-288

## Description

Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. This vulnerability is fixed in 15.5.16 and 16.2.5.

## Affected vendors and products

- Red Hat: Red Hat Enterprise Linux 10
- Red Hat: Red Hat Enterprise Linux 7
- Red Hat: Red Hat Enterprise Linux 8
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3
- Red Hat: Red Hat Trusted Artifact Signer 1.3
- Red Hat: Red Hat Trusted Artifact Signer 1.4
- Red Hat: Streams for Apache Kafka 2.9.4
- Red Hat: streams for Apache Kafka 3
- vercel: next.js

## Tracked companies

- [Vercel](https://rewindex.com/company/vercel.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-44574)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-44574)
- [https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqv](https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqv)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-44574 · Markdown: https://rewindex.com/cve/CVE-2026-44574.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-44574 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:17.669Z