CVE-2026-50191: CWE-287: Improper Authentication in RARgames 4gaBoards
4gaBoards versions prior to 3.3.8 have an improper authentication vulnerability that allows an attacker to create an unverified local account using a victim's email and authenticate without verification. When SSO via Google, GitHub, Microsoft, or OIDC is configured, the attacker-controlled local account is linked to the victim's verified SSO identity without confirming ownership. This enables the attacker to retain local-password access and gain unauthorized access to the victim's projects, data, and permissions. The issue is fixed in version 3.3.8.
AI Analysis
Technical Summary
CVE-2026-50191 is an improper authentication vulnerability (CWE-287) in 4gaBoards by RARgames affecting versions prior to 3.3.8. When registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled alongside configured SSO providers (Google, GitHub, Microsoft, OIDC), the POST /api/register endpoint allows creation of an unverified local account with a victim's email. The POST /api/access-tokens endpoint permits authentication of this unverified account. During the victim's first SSO login, the system links the attacker-controlled local account to the victim's verified SSO identity without verifying ownership, allowing the attacker to maintain local-password access and access the victim's projects and data. This vulnerability is resolved in version 3.3.8.
Potential Impact
An attacker can create an unverified local account with a victim's email and authenticate without verification, then link this account to the victim's verified SSO identity during the victim's first login. This results in unauthorized access to the victim's projects, data, and permissions, compromising confidentiality, integrity, and availability of the victim's resources within 4gaBoards.
Mitigation Recommendations
Upgrade 4gaBoards to version 3.3.8 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the available data.
CVE-2026-50191: CWE-287: Improper Authentication in RARgames 4gaBoards
Description
4gaBoards versions prior to 3.3.8 have an improper authentication vulnerability that allows an attacker to create an unverified local account using a victim's email and authenticate without verification. When SSO via Google, GitHub, Microsoft, or OIDC is configured, the attacker-controlled local account is linked to the victim's verified SSO identity without confirming ownership. This enables the attacker to retain local-password access and gain unauthorized access to the victim's projects, data, and permissions. The issue is fixed in version 3.3.8.
CVSS v3.1
Score 8.8high
Affected software
pkg:github/rargames/4gaBoardsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-50191 is an improper authentication vulnerability (CWE-287) in 4gaBoards by RARgames affecting versions prior to 3.3.8. When registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled alongside configured SSO providers (Google, GitHub, Microsoft, OIDC), the POST /api/register endpoint allows creation of an unverified local account with a victim's email. The POST /api/access-tokens endpoint permits authentication of this unverified account. During the victim's first SSO login, the system links the attacker-controlled local account to the victim's verified SSO identity without verifying ownership, allowing the attacker to maintain local-password access and access the victim's projects and data. This vulnerability is resolved in version 3.3.8.
Potential Impact
An attacker can create an unverified local account with a victim's email and authenticate without verification, then link this account to the victim's verified SSO identity during the victim's first login. This results in unauthorized access to the victim's projects, data, and permissions, compromising confidentiality, integrity, and availability of the victim's resources within 4gaBoards.
Mitigation Recommendations
Upgrade 4gaBoards to version 3.3.8 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-03T22:05:13.645Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a84d389c6e8be0332cafc87
Added to database: 08/18/2026, 21:50:01 UTC
Last enriched: 08/18/2026, 22:04:58 UTC
Last updated: 08/19/2026, 01:56:13 UTC
Views: 8
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