CVE-2026-41248
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
SeverityCritical
CVSS9.1
Exploit probability—
Product@clerk/nextjs
PublishedApr 24, 2026
First seenApr 24, 2026
Weakness typeCWE-436CWE-436CWE-863Incorrect authorization
How to fix
Update
- @clerk/nextjs5.7.6, 6.39.2, 7.2.1 or later
- @clerk/nuxt1.13.28, 2.2.2 or later
- @clerk/astro1.5.7, 2.17.10, 3.0.15 or later
- @clerk/shared2.22.1, 3.47.4, 4.8.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @clerk/nextjsnpm | 5.0.0 ≤ v < 5.7.6, 6.0.0-snapshot.vb87a27f ≤ v < 6.39.2, 7.0.0 ≤ v < 7.2.1 | 5.7.6, 6.39.2, 7.2.1 |
| @clerk/nuxtnpm | 1.1.0 ≤ v < 1.13.28, 2.0.0 ≤ v < 2.2.2 | 1.13.28, 2.2.2 |
| @clerk/astronpm | 0.0.1 ≤ v < 1.5.7, 2.0.0-snapshot.v20241206174604 ≤ v < 2.17.10, 3.0.0 ≤ v < 3.0.15 | 1.5.7, 2.17.10, 3.0.15 |
| @clerk/sharednpm | 2.20.17 ≤ v < 2.22.1, 3.0.0-canary.v20250225091530 ≤ v < 3.47.4, 4.0.0 ≤ v < 4.8.1 | 2.22.1, 3.47.4, 4.8.1 |
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