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Clerk JavaScript CVE-2026-41248

| EUVD-2026-25632 CRITICAL
Interpretation Conflict (CWE-436)
2026-04-24 GitHub_M GHSA-vqx2-fgx2-5wq9
Authentication Bypass
9.1
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
Patch released
Apr 29, 2026 - 20:56 nvd
Patch available
Patch available
Apr 24, 2026 - 23:02 EUVD
EUVD ID Assigned
Apr 24, 2026 - 21:15 euvd
EUVD-2026-25632
CVE Published
Apr 24, 2026 - 21:04 nvd
CRITICAL 9.1

DescriptionNVD

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

Analysis

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. …

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CVE-2026-41248 vulnerability details – vuln.today
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