CVE-2026-105860 Payload: Tenant authorization bypass in Multi-Tenant Plugin
An authenticated user can assign their account to other tenants due to missing authorization checks in the default tenant array field access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-105860?
CVE-2026-105860 is a high-severity missing authorization vulnerability in payloadcms payload, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Payload is a free and open source headless content management system. In @payloadcms/plugin-multi-tenant versions before 3.90.0 and canary versions before 4.0.0-canary.34, the default tenant array field access allows an authenticated user to assign the user's own account to other tenants. Deployments that replace the default behavior with secured tenants arrayFieldAccess.create and tenants arrayFieldAccess.update functions are not affected by this behavior. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Weakness: CWE-862
Which versions are affected by CVE-2026-105860?
4 open source packages ship an affected version, including @payloadcms/plugin-multi-tenant. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@payloadcms/plugin-multi-tenant npm | All versions | 3.90.0 |
@payloadcms/plugin-multi-tenant npm | All versions | 3.90.0 |
@payloadcms/plugin-multi-tenant npm | From 4.0.0-canary.0 | 4.0.0-canary.34 |
@payloadcms/plugin-multi-tenant npm | From 4.0.0-canary.0 | 4.0.0-canary.34 |
Products include Payloadcms Payload.
How do I fix CVE-2026-105860?
Upgrade @payloadcms/plugin-multi-tenant to a fixed version for your release line: 3.90.0 or 4.0.0-canary.34.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105860 being exploited?
There is no known exploitation of CVE-2026-105860 in the wild and no public exploit code.
Other vulnerabilities in payloadcms payload
- CVE-2026-105857 Payload: RCE in Payload Form Builder
- CVE-2026-105859 Payload: Unauthorized update to collection documents
- CVE-2026-25544 Payload has an SQL Injection in JSON/RichText Queries on PostgreSQL/SQLite Adapters
- CVE-2022-27952 Unrestricted Upload of File with Dangerous Type in Payload
- CVE-2026-105851 Payload: Field access control bypass on auth collections
Sources
Also known as GHSA-p96c-xwx8-3cqj.