{"id":"CVE-2026-105860","aliases":["GHSA-p96c-xwx8-3cqj"],"url":"https://o3.security/vulnerability/CVE-2026-105860","summary":"Payload: Tenant authorization bypass in Multi-Tenant Plugin","details":"## Impact\n\nWhen using the default tenant array field access, an authenticated user could assign themselves to other tenants.\n\n**You are affected if:**\n\n- You are using `@payloadcms/plugin-multi-tenant`\n\nIf you configure the tenants arrayFieldAccess.create/update functions, a secured replacement membership field, you are not affected by this specific default behavior.\n\n## Patches\n\nUsers should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`.\n\n## Workarounds\n\nConfigure tenants arrayFieldAccess.create and tenants arrayFieldAccess.update so only trusted users authorized for all tenants can modify memberships.","published":"2026-10-06T16:33:20.213Z","modified":"2026-10-08T02:51:17.103084403Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"@payloadcms/plugin-multi-tenant","fixedVersion":"3.90.0"},{"ecosystem":"npm","name":"@payloadcms/plugin-multi-tenant","fixedVersion":"4.0.0-canary.34"}],"fix":{"url":"https://github.com/payloadcms/payload/commit/19b58692d20d3947f31124bf7a88ac14a5ebf02e","label":"payloadcms/payload@19b5869"},"references":[{"type":"WEB","url":"https://github.com/payloadcms/payload/releases/tag/v3.90.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105860.json"},{"type":"ADVISORY","url":"https://github.com/payloadcms/payload/security/advisories/GHSA-p96c-xwx8-3cqj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105860"},{"type":"FIX","url":"https://github.com/payloadcms/payload/commit/19b58692d20d3947f31124bf7a88ac14a5ebf02e"},{"type":"PACKAGE","url":"https://github.com/payloadcms/payload"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-08T02:51:17.103084403Z"}}