{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50191", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-03T22:05:13.645Z", "datePublished": "2026-08-18T21:33:16.270Z", "dateUpdated": "2026-08-18T21:33:16.270Z"}, "containers": {"cna": {"title": "4gaBoards: Pre-Account Takeover via SSO Email Linkage", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-288", "lang": "en", "description": "CWE-288: Authentication Bypass Using an Alternate Path or Channel", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77"}, {"name": "https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8", "tags": ["x_refsource_MISC"], "url": "https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8"}, {"name": "https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8"}], "affected": [{"vendor": "RARgames", "product": "4gaBoards", "versions": [{"version": "< 3.3.8", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-18T21:33:16.270Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-f3p6-chc6-pc77", "discovery": "UNKNOWN"}}}}

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