CVE-2026-105864: CWE-863: Incorrect Authorization in payloadcms payload
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, an authenticated user limited to one tenant can create a record in another tenant when at least one tenant-enabled collection exists. Reads and direct edits of existing documents in the target tenant are not bypassed. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
CVSS v4.0
Score 5.3medium
Affected software
payloadcms
payload
@payloadcms
plugin-multi-tenant
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-105864 is an incorrect authorization vulnerability (CWE-863) in the PayloadCMS plugin 'plugin-multi-tenant'. Authenticated users restricted to a single tenant can bypass tenant isolation to create new records in another tenant when at least one tenant-enabled collection exists. The vulnerability does not allow reading or editing existing documents in the other tenant. The flaw affects versions prior to 3.90.0 and canary versions from 4.0.0-canary.0 up to but not including 4.0.0-canary.34. The issue is resolved in versions 3.90.0 and 4.0.0-canary.34.
Potential Impact
An authenticated user with tenant-limited access can create records in tenants they should not have access to, potentially leading to unauthorized data insertion or pollution of another tenant's data space. However, the vulnerability does not permit unauthorized reading or modification of existing data in other tenants.
Mitigation Recommendations
Upgrade to PayloadCMS plugin-multi-tenant version 3.90.0 or later, or to canary version 4.0.0-canary.34 or later, where this authorization issue is fixed. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-05T23:06:29.748Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac52a0a2cdf04f656c7686d
Added to database: 10/06/2026, 17:04:10 UTC
Last enriched: 10/06/2026, 17:18:47 UTC
Last updated: 10/06/2026, 18:57:27 UTC
Views: 10
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