Clerk: Authorization bypass when combining organization, billing, or reverification checks

7.6 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Description

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.

Basic Information

ID CVE-2026-42349

Source GitHub_M

Published May 11, 2026 at 16:08

Affected Product

Vendor clerk

Product javascript

Version >= 5.22.0, < 5.125.10

Affected Versions clerk javascript >= 5.22.0, < 5.125.10
clerk javascript >= 6.0.0, < 6.7.5
@clerk shared >= 3.0.0, <= 3.47.4
@clerk shared >= 4.0.0, <= 4.8.2
@clerk backend >= 2.0.0, <= 2.33.2
@clerk backend >= 3.0.0, <= 3.2.13
@clerk nextjs >= 6.0.0, <= 6.39.2
@clerk nextjs >= 7.0.0, <= 7.2.3
@clerk clerk-react >= 5.9.0, <= 5.61.5
@clerk react >= 6.0.0, <= 6.4.2
@clerk vue >= 1.0.0, <= 1.17.20
@clerk vue >= 2.0.0, <= 2.0.15
@clerk astro >= 2.0.0, <= 2.17.10
@clerk astro >= 3.0.0, <= 3.0.17
@clerk nuxt >= 1.0.0, <= 1.13.28
@clerk nuxt >= 2.0.0, <= 2.2.4
@clerk clerk-expo >= 2.2.11, <= 2.19.35
@clerk expo >= 3.0.0, <= 3.2.1
@clerk react-router >= 0.0.1, <= 2.4.12
@clerk react-router >= 3.0.0, <= 3.1.3
@clerk tanstack-react-start >= 0.0.1, <= 0.29.10
@clerk tanstack-react-start >= 1.0.0, <= 1.1.3
@clerk chrome-extension >= 1.3.5, <= 2.9.14
@clerk chrome-extension >= 3.0.0, <= 3.1.14
@clerk fastify >= 1.0.42, <= 2.6.30
@clerk fastify >= 3.0.0, <= 3.1.15
@clerk express >= 0.1.0, <= 1.7.78
@clerk express >= 2.0.0, <= 2.1.5
@clerk hono >= 0.0.2, <= 0.1.15

CWE Classification

CWE-754 CWE-863

References

github.com /clerk/javascript/security/advisories/GHSA-w24r-5266-9c3c

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Clerk: Authorization bypass when combining organization, billing, or reverification checks_CVE-2026-42349