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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00093.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
clerk astro affected
Version Status Constraints
>= 0.0.1, < 1.5.7 affected —
>= 2.0.0-snapshot.v20241206174604, <= 2.17.9 affected —
>= 3.0.0, < 3.0.15 affected —
clerk nextjs affected
Version Status Constraints
>= 5.0.0, < 5.7.6 affected —
>= 6.0.0-snapshot.vb87a27f, < 6.39.2 affected —
>= 7.0.0, < 7.2.1 affected —
clerk nuxt affected
Version Status Constraints
>= 1.1.0, < 1.13.28 affected —
>= 2.0.0, < 2.2.2 affected —
clerk shared affected
Version Status Constraints
>= 2.20.17, < 2.22.1 affected —
>= 3.0.0-canary.v20250225091530, < 3.47.4 affected —
>= 4.0.0, < 4.8.1 affected —

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9 cve-icon cve-icon
History

Mon, 27 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Clerk
Clerk astro
Clerk nextjs
Clerk nuxt
Clerk shared
Vendors & Products Clerk
Clerk astro
Clerk nextjs
Clerk nuxt
Clerk shared

Mon, 27 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 24 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
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
Title Official Clerk JavaScript SDKs: Middleware-based route protection bypass
Weaknesses CWE-436
CWE-863
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-27T13:46:28.646Z

Reserved: 2026-04-18T03:47:03.136Z

Link: CVE-2026-41248

cve-icon Vulnrichment

Updated: 2026-04-27T13:46:23.286Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-24T21:16:18.497

Modified: 2026-04-27T18:57:20.293

Link: CVE-2026-41248

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-27T19:52:50Z

Weaknesses