# CVE-2026-50191

## Summary

- **CVE ID:** CVE-2026-50191
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** CWE-287, CWE-288
- **Published:** Aug 18, 2026
- **Last Modified:** Aug 19, 2026

## Description

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.

## Affected Products

- RARgames — 4gaBoards (< 3.3.8)

## References

- [CNA](https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77)
- [CNA](https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8)
- [CNA](https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 25.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._