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Critical severity9.1NVD Advisory· Published Apr 24, 2026· Updated Apr 29, 2026

CVE-2026-41248

CVE-2026-41248

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 packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
@clerk/nextjsnpm
>= 5.0.0, < 5.7.65.7.6
@clerk/nuxtnpm
>= 1.1.0, < 1.13.281.13.28
@clerk/astronpm
>= 0.0.1, < 1.5.71.5.7
@clerk/sharednpm
>= 2.20.17, < 2.22.12.22.1
@clerk/nextjsnpm
>= 6.0.0-snapshot.vb87a27f, < 6.39.26.39.2
@clerk/nextjsnpm
>= 7.0.0, < 7.2.17.2.1
@clerk/nuxtnpm
>= 2.0.0, < 2.2.22.2.2
@clerk/astronpm
>= 2.0.0-snapshot.v20241206174604, < 2.17.102.17.10
@clerk/astronpm
>= 3.0.0, < 3.0.153.0.15
@clerk/sharednpm
>= 3.0.0-canary.v20250225091530, < 3.47.43.47.4
@clerk/sharednpm
>= 4.0.0, < 4.8.14.8.1

Affected products

1

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

3

News mentions

50