CVE-2026-105860
highpriority · track · 28OT risk · elevatedEPSS 0.002 · 9 %ileUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
- npm @payloadcms/plugin-multi-tenant4.0.0-canary.0 → 4.0.0-canary.34osvUSpkg:npm/%40payloadcms/plugin-multi-tenant
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-p96c-xwx8-3cqjPayload has a tenant authorization bypass in Multi-Tenant Plugin2026-10-07ghsa · osvUS
## Impact When using the default tenant array field access, an authenticated user could assign themselves to other tenants. **You are affected if:** - You are using `@payloadcms/plugin-multi-tenant` If you configure the tenants arrayFieldAccess.create/update functions, a secured replacement membership field, you are not affected by this specific default behavior. ## Patches Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ## Workarounds Configure tenants arrayFieldAccess.create and tenants arrayFieldAccess.update so only trusted users authorized for all tenants can modify memberships.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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