{"id":"GHSA-66wr-7vmr-p5jq","summary":"Payload authentication token field handling issue","details":"### Impact\n\nUnder certain field configurations, Payload could include unintended values in the authentication token issued at login.\n\nYou are affected if:\n\n- You use an affected Payload version and have configured a custom field option that maps a field to a reserved authentication claim name.\n\n### Patches\nPayload now restricts which field configuration options can influence the contents of the authentication token.\n\nUsers should upgrade payload packages to `\u003e= 3.90.0` or `\u003e= 4.0.0-canary.34`.\n\n### Workarounds\nThere is no complete workaround. Users should upgrade payload packages to `\u003e= 3.90.0` or `\u003e= 4.0.0-canary.34`.","aliases":["CVE-2026-105863"],"modified":"2026-10-07T20:45:05.341961460Z","published":"2026-10-07T20:28:18Z","database_specific":{"cwe_ids":["CWE-290","CWE-915"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-10-07T20:28:18Z","nvd_published_at":"2026-10-06T17:17:22Z"},"references":[{"type":"WEB","url":"https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105863"},{"type":"WEB","url":"https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c"},{"type":"PACKAGE","url":"https://github.com/payloadcms/payload"},{"type":"WEB","url":"https://github.com/payloadcms/payload/releases/tag/v3.90.0"}],"affected":[{"package":{"name":"payload","ecosystem":"npm","purl":"pkg:npm/payload"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.90.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-66wr-7vmr-p5jq/GHSA-66wr-7vmr-p5jq.json"}},{"package":{"name":"payload","ecosystem":"npm","purl":"pkg:npm/payload"},"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-66wr-7vmr-p5jq/GHSA-66wr-7vmr-p5jq.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}