{"id":"CVE-2026-50191","summary":"4gaBoards: Pre-Account Takeover via SSO Email Linkage","details":"4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards is vulnerable to pre-account takeover when registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled and Google, GitHub, Microsoft, or OIDC SSO is configured. The POST /api/register endpoint permits creation of an unverified local account with a victim's email address, and POST /api/access-tokens permits that account to authenticate while isVerified is false. During the victim's first SSO login, server/api/helpers/users/get-create-one-for-github-sso.js, server/api/helpers/users/get-create-one-for-google-sso.js, server/api/helpers/users/get-create-one-for-microsoft-sso.js, and server/api/helpers/users/get-create-one-for-oidc-sso.js find the attacker-controlled account by email and link the verified SSO identity without confirming ownership of the local account. The attacker can retain local-password access to the linked account and obtain the victim's projects, data, and permissions. This issue is fixed in version 3.3.8.","aliases":["GHSA-f3p6-chc6-pc77"],"modified":"2026-09-11T03:30:40.220469077Z","published":"2026-08-18T21:33:16.270Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-287","CWE-288"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50191.json"},"references":[{"type":"WEB","url":"https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50191.json"},{"type":"ADVISORY","url":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50191"},{"type":"FIX","url":"https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rargames/4gaboards","events":[{"introduced":"0"},{"fixed":"484c92d583cfbc6815f96364071bb531ec594bf8"},{"fixed":"32c8471443e2d7530ed617a414c864b17c791ced"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"3.3.8"}]}}],"versions":["v3.3.7","v3.3.6","v3.3.5","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.16","v3.2.15","v3.2.14","v3.2.13","v3.2.12","v3.2.11","v3.2.10","v3.2.9","v3.2.8","v3.2.7","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.10","v3.1.9","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.8","v3.0.7","v3.0.6","v3.0.5","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.0.24","v2.0.23","v2.0.22","v2.0.21","v2.0.20","v2.0.19","v2.0.18","v2.0.17","v2.0.16","v2.0.15","v2.0.14","v2.0.13","v2.0.12","v2.0.11","v2.0.10","v2.0.9","v2.0.8","v2.0.7","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.1","v2.0.0","v1.10.7","v1.10.6","v1.10.4","v1.10.3","v1.10.2","v1.10.1","v1.10.0","v1.9.2","v1.9.1","v1.9.0","v1.8.9","v1.8.8","v1.8.7","v1.8.6","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.0","v1.5.2","v1.5.1","v1.5.0","v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.6","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.0","v1.0.0-beta.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50191.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}