Missing 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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- published14 Oct 2026
- disclosed7 Oct 2026
- creditmeifukun
Introduced: 7 Oct 2026
NewCVE-2026-105860 (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 Missing Authorization via the tenant field write path in tenantField/index.ts, where tenant membership is not enforced on create or update operations. An authenticated user can assign themselves to arbitrary tenants by submitting write requests that reference tenant IDs they do not belong to, bypassing the intended multi-tenant isolation boundary.
Note: This is only exploitable when using the default tenant array field access configuration.