What’s Vulnerable › Vulnerabilities

CVE-2026-34456: Reviactyl: OAuth account takeover via auto-linking

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-01 · updated 2026-10-26
• Weakness: CWE-284

Description

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.

Affected products

• Reviactyl: 26.2.0-beta1, 26.2.0-beta2, 26.2.0-beta3, 26.2.0-beta4

References

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

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