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CVE-2026-42349

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
clerk / javascriptaffected >= 5.22.0, < 5.125.10; affected >= 6.0.0, < 6.7.5
@clerk / sharedaffected >= 3.0.0, <= 3.47.4; affected >= 4.0.0, <= 4.8.2
@clerk / backendaffected >= 2.0.0, <= 2.33.2; affected >= 3.0.0, <= 3.2.13
@clerk / nextjsaffected >= 6.0.0, <= 6.39.2; affected >= 7.0.0, <= 7.2.3
@clerk / clerk-reactaffected >= 5.9.0, <= 5.61.5
@clerk / reactaffected >= 6.0.0, <= 6.4.2
@clerk / vueaffected >= 1.0.0, <= 1.17.20; affected >= 2.0.0, <= 2.0.15
@clerk / astroaffected >= 2.0.0, <= 2.17.10; affected >= 3.0.0, <= 3.0.17
@clerk / nuxtaffected >= 1.0.0, <= 1.13.28; affected >= 2.0.0, <= 2.2.4
@clerk / clerk-expoaffected >= 2.2.11, <= 2.19.35
@clerk / expoaffected >= 3.0.0, <= 3.2.1
@clerk / react-routeraffected >= 0.0.1, <= 2.4.12; affected >= 3.0.0, <= 3.1.3
@clerk / tanstack-react-startaffected >= 0.0.1, <= 0.29.10; affected >= 1.0.0, <= 1.1.3
@clerk / chrome-extensionaffected >= 1.3.5, <= 2.9.14; affected >= 3.0.0, <= 3.1.14
@clerk / fastifyaffected >= 1.0.42, <= 2.6.30; affected >= 3.0.0, <= 3.1.15
@clerk / expressaffected >= 0.1.0, <= 1.7.78; affected >= 2.0.0, <= 2.1.5
@clerk / honoaffected >= 0.0.2, <= 0.1.15

CWE

CWE-754, CWE-863

References

ADP enrichment

CISA-ADP

No English description supplied.