CVE-2026-41248 | THREATINT

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

PUBLISHED Reserved 2026-04-18 | Published 2026-04-24 | Updated 2026-04-24 | Assigner GitHub_M

CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-436: Interpretation Conflict

CWE-863: Incorrect Authorization

Product status

>= 0.0.1, < 1.5.7

affected

>= 2.0.0-snapshot.v20241206174604, <= 2.17.9

affected

>= 3.0.0, < 3.0.15

affected

>= 5.0.0, < 5.7.6

affected

>= 6.0.0-snapshot.vb87a27f, < 6.39.2

affected

>= 7.0.0, < 7.2.1

affected

>= 1.1.0, < 1.13.28

affected

>= 2.0.0, < 2.2.2

affected

>= 2.20.17, < 2.22.1

affected

>= 3.0.0-canary.v20250225091530, < 3.47.4

affected

>= 4.0.0, < 4.8.1

affected

References

github.com/...script/security/advisories/GHSA-vqx2-fgx2-5wq9

cve.org (CVE-2026-41248)

nvd.nist.gov (CVE-2026-41248)

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