Incorrect Authorization Affecting @payloadcms/plugin-multi-tenant package, versions <3.90.0>=4.0.0-canary.0 <4.0.0-canary.34
Threat Intelligence
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Start learning- Snyk IDSNYK-JS-PAYLOADCMSPLUGINMULTITENANT-20883332
- published13 Oct 2026
- disclosed7 Oct 2026
- creditvalmet083
Introduced: 7 Oct 2026
NewCVE-2026-105864 (opens in a new tab)How to fix?
Upgrade @payloadcms/plugin-multi-tenant to version 3.90.0, 4.0.0-canary.34 or higher.
Overview
@payloadcms/plugin-multi-tenant is a Multi Tenant plugin for Payload
Affected versions of this package are vulnerable to Incorrect Authorization via the tenantField default value logic in packages/plugin-multi-tenant/src/fields/tenantField/index.ts, where the return value of req.payload.count() is used directly as a boolean rather than checking the totalDocs property. Because any non-null object is truthy in JavaScript, the tenant validity check always evaluates to true, allowing an authenticated user to set an arbitrary tenant cookie value and have it accepted as a valid tenant, bypassing tenant isolation controls.