Clerk Fastify vulnerabilities

1 vulnerability

Known vulnerabilities in Clerk Fastify, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

8.1CVE-2026-42349@clerkastro+50
EPSS score
0.43%
Clerk JavaScript is the official JavaScript repository for Clerk authentication. has(), auth.protect(), and related authorization predicates in @clerk/shared, @clerk/nextjs, @clerk/backend, and other framework SDKs can return true for certain combined authorization checks when the result should be false, allowing a gated action to proceed for a user who does not satisfy the full set of requested conditions. This call shape can be bypassed if certain conditions are met: a has() or auth.protect() call that combines a reverification check with any of role, permission, feature, or plan, or that combines a billing check (feature or plan) with a role or permission check. This vulnerability is fixed in @clerk/clerk-js 5.125.10 and 6.7.5.