# CVE-2026-41248

## Summary

- **CVE ID:** CVE-2026-41248
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-436, CWE-863
- **Published:** Apr 24, 2026
- **Last Modified:** Apr 27, 2026

## 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

## Affected Products

- clerk — astro (>= 0.0.1, < 1.5.7)
- clerk — astro (>= 2.0.0-snapshot.v20241206174604, <= 2.17.9)
- clerk — astro (>= 3.0.0, < 3.0.15)
- clerk — nextjs (>= 5.0.0, < 5.7.6)
- clerk — nextjs (>= 6.0.0-snapshot.vb87a27f, < 6.39.2)
- clerk — nextjs (>= 7.0.0, < 7.2.1)
- clerk — nuxt (>= 1.1.0, < 1.13.28)
- clerk — nuxt (>= 2.0.0, < 2.2.2)
- clerk — shared (>= 2.20.17, < 2.22.1)
- clerk — shared (>= 3.0.0-canary.v20250225091530, < 3.47.4)
- clerk — shared (>= 4.0.0, < 4.8.1)

## References

- [CNA](https://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 24.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._