# CVE-2026-41248

> Vulnerability · severity: **CRITICAL** (CVSS 9.1).

## Description

Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in @clerk/astro 1.5.7, 2.17.10, and 3.0.15; @clerk/nextjs 5.7.6, 6.39.2, and 7.2.1; @clerk/nuxt 1.13.28 and 2.2.2; and @clerk/shared 2.22.1, 3.47.4, anc 4.8.1

## Key facts

- **CVE ID:** CVE-2026-41248
- **Published:** 2026-04-24
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.1
- **CWE codes:** CWE-436, CWE-863

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41248

## Citation

> AI Analytics. CVE-2026-41248. Retrieved 2026-07-09 from https://api.ai-analytics.org/cve/CVE-2026-41248. Derived from NIST NVD. Licensed CC0.

---

*[Dataset catalog](https://api.ai-analytics.org/datasets/) · [AI Analytics](https://api.ai-analytics.org/) · CC0 1.0*