Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-105860Payload: Tenant authorization bypass in Multi-Tenant Plugin

High 7.1

In plain English

A high-severity missing authorization in payload from payloadcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.2%top 91.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@payloadcms/plugin-multi-tenant	3.90.0	GHSA-p96c-xwx8-3cqj
npm	@payloadcms/plugin-multi-tenant	4.0.0-canary.34	GHSA-p96c-xwx8-3cqj

Affected products (as reported)

Vendor	Product	Versions
payloadcms	payload	< 3.90.0>= 4.0.0-canary.0, < 4.0.0-canary.34

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/payloadcms/payload/security/advisories/GHSA-p96c-xwx8-3cqj x_refsource_CONFIRM
https://github.com/payloadcms/payload/commit/19b58692d20d3947f31124bf7a88ac14a5ebf02e x_refsource_MISC
https://github.com/payloadcms/payload/releases/tag/v3.90.0 x_refsource_MISC