CVE-2026-50191
High · CVSS 8.8Published 2026-08-18
CVSS
8.8
High
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-50191?
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.
CVSS Score Explained
CVSS 8.8 is High severity. Exploitation is likely straightforward and the impact is significant — data loss, privilege escalation, or remote code execution are common outcomes. Patch as soon as possible.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8
- PATCHhttps://github.com/RARgames/4gaBoards/releases/tag/v3.3.8
- ›https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77
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