CVE-2026-34456

CRITICAL 9.1

Reviactyl: OAuth account takeover via auto-linking

CVSS Score

9.1

EPSS Score

0.1%

EPSS Percentile

21th

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.

CWE	CWE-284
Vendor	reviactyl
Product	panel
Published	Apr 1, 2026
Last Updated	Apr 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

reviactyl / panel

>= 26.2.0-beta.1, < 26.2.0-beta.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/reviactyl/panel/security/advisories/GHSA-8mcf-rp68-xhfg github.com: https://github.com/reviactyl/panel/commit/fe0c29fc62fefe354c9ab8936dfe30fdb586a896 github.com: https://github.com/reviactyl/panel/releases/tag/v26.2.0-beta.5