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CVE-2026-34456

CRITICAL CVSS 3.1: 9.1 EPSS 0.07%
Updated Apr 01, 2026
Google
Parameter Value
CVSS 9.1 (CRITICAL)
Affected Versions before 26.2.0
Fixed In 26.2.0
Type CWE-284 (Improper Access Control)
Vendor Google
Public PoC No

Reviactyl is an open-source game server management panel built using Laravel, React, FilamentPHP, Vite, and Go. From version 26.2.0-beta.1 to before version 26.2.0-beta.5, a vulnerability in the OAuth authentication flow allowed automatic linking of social accounts based solely on matching email addresses. An attacker could create or control a social account (e.g., Google, GitHub, Discord) using a victim’s email address and gain full access to the victim's account without knowing their password.

This results in a full account takeover with no prior authentication required. This issue has been patched in version 26.2.0-beta.5.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1