Access Control Flaw in Payload CMS by Payload Inc.
CVE-2026-105864

5.3MEDIUM

Key Information:

Vendor

Payloadcms

Status
Payload
Plugin-multi-tenant
Vendor
CVE Published:
6 October 2026

What is CVE-2026-105864?

An authentication-related access control issue exists in Payload CMS that affects users limited to a single tenant within the multi-tenant plugin. This flaw allows such users to create records in different tenant spaces when one or more tenant-enabled collections are available. The problem does not extend to reading or directly editing documents in other tenants, but the ability to create records poses a risk of data leakage and unintentional access to sensitive information. Versions 3.90.0 and 4.0.0-canary.34 have addressed this vulnerability to enhance security.

Affected Version(s)

payload < 3.90.0 < 3.90.0

payload >= 4.0.0-canary.0, < 4.0.0-canary.34 < 4.0.0-canary.0, 4.0.0-canary.34

plugin-multi-tenant < 3.90.0 < 3.90.0

References

https://github.com/payloadcms/payload/security/advisories...
x_refsource_CONFIRM
https://github.com/payloadcms/payload/commit/b8fc06a18afb...
x_refsource_MISC
https://github.com/payloadcms/payload/releases/tag/v3.90.0
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.