CVE-2026-41248
Published:April 24, 2026
Updated:April 27, 2026
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 Packages
@clerk/nuxt (NPM):
Affected version(s) >=2.0.0 <1.13.28, 2.2.2Fix Suggestion:
Update to version 1.13.28, 2.2.2@clerk/shared (NPM):
Affected version(s) >=4.0.0 <2.22.1, 3.47.4, 4.8.1Fix Suggestion:
Update to version 2.22.1, 3.47.4, 4.8.1@clerk/astro (NPM):
Affected version(s) >=3.0.0 <1.5.7, 2.17.10, 3.0.15Fix Suggestion:
Update to version 1.5.7, 2.17.10, 3.0.15@clerk/nextjs (NPM):
Affected version(s) >=7.0.0 <5.7.6, 6.39.2, 7.2.1Fix Suggestion:
Update to version 5.7.6, 6.39.2, 7.2.1Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
EPSS
Base Score:
0.09
