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CVE-2026-41248

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CVE-2026-41248

Published: Apr 24, 2026

Modified: Apr 27, 2026

PUBLISHED

CVSS v3.1

9.1

CRITICAL

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

VendorProductVersions

clerk

astro

affected
>= 0.0.1, < 1.5.7
affected
>= 2.0.0-snapshot.v20241206174604, <= 2.17.9
affected
>= 3.0.0, < 3.0.15

clerk

nextjs

affected
>= 5.0.0, < 5.7.6
affected
>= 6.0.0-snapshot.vb87a27f, < 6.39.2
affected
>= 7.0.0, < 7.2.1

clerk

nuxt

affected
>= 1.1.0, < 1.13.28
affected
>= 2.0.0, < 2.2.2

clerk

shared

affected
>= 2.20.17, < 2.22.1
affected
>= 3.0.0-canary.v20250225091530, < 3.47.4
affected
>= 4.0.0, < 4.8.1

Weaknesses (CWE)

CWE-436
CWE-863

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

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