Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-42349

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 15.5%
CVSS Severity
CVSS v3 Score 8.1
Products affected by CVE-2026-42349


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