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CVE-2026-41248

Official Clerk JavaScript SDKs: Middleware-based route protection bypass PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
clerk / astroaffected >= 0.0.1, < 1.5.7; affected >= 2.0.0-snapshot.v20241206174604, <= 2.17.9; affected >= 3.0.0, < 3.0.15
clerk / nextjsaffected >= 5.0.0, < 5.7.6; affected >= 6.0.0-snapshot.vb87a27f, < 6.39.2; affected >= 7.0.0, < 7.2.1
clerk / nuxtaffected >= 1.1.0, < 1.13.28; affected >= 2.0.0, < 2.2.2
clerk / sharedaffected >= 2.20.17, < 2.22.1; affected >= 3.0.0-canary.v20250225091530, < 3.47.4; affected >= 4.0.0, < 4.8.1

CWE

CWE-436, CWE-863

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.