by Kastro CVE-2026-41248
clerk astro — Official Clerk JavaScript SDKs: Middleware-based route protection bypass
Description · from the CVE record
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
ProductAffectedFixed inSource
astro>= 0.0.1, < 1.5.7–CNA
astro>= 2.0.0-snapshot.v20241206174604, <= 2.17.9–CNA
astro>= 3.0.0, < 3.0.15–CNA
nextjs>= 5.0.0, < 5.7.6–CNA
nextjs>= 6.0.0-snapshot.vb87a27f, < 6.39.2–CNA
nextjs>= 7.0.0, < 7.2.1–CNA
nuxt>= 1.1.0, < 1.13.28–CNA
nuxt>= 2.0.0, < 2.2.2–CNA
shared>= 2.20.17, < 2.22.1–CNA
shared>= 3.0.0-canary.v20250225091530, < 3.47.4–CNA
shared>= 4.0.0, < 4.8.1–CNA
Scores by source
GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total