{"id":"GHSA-p96c-xwx8-3cqj","summary":"Payload has a 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 `\u003e= 3.90.0` or `\u003e= 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.","aliases":["CVE-2026-105860"],"modified":"2026-10-07T20:45:05.342379505Z","published":"2026-10-07T20:29:53Z","database_specific":{"cwe_ids":["CWE-862"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-10-07T20:29:53Z","nvd_published_at":"2026-10-06T17:17:22Z"},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/payloadcms/payload/commit/19b58692d20d3947f31124bf7a88ac14a5ebf02e"},{"type":"PACKAGE","url":"https://github.com/payloadcms/payload"},{"type":"WEB","url":"https://github.com/payloadcms/payload/releases/tag/v3.90.0"}],"affected":[{"package":{"name":"@payloadcms/plugin-multi-tenant","ecosystem":"npm","purl":"pkg:npm/%40payloadcms/plugin-multi-tenant"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.90.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p96c-xwx8-3cqj/GHSA-p96c-xwx8-3cqj.json"}},{"package":{"name":"@payloadcms/plugin-multi-tenant","ecosystem":"npm","purl":"pkg:npm/%40payloadcms/plugin-multi-tenant"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0-canary.0"},{"fixed":"4.0.0-canary.34"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p96c-xwx8-3cqj/GHSA-p96c-xwx8-3cqj.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}