CVE-2026-34456CWE-284

Reviactyl: OAuth account takeover via auto-linking

Critical · published April 1, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
52.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00692 · 52.3th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-04-01T20:00Z
EPSS history
Timeline
  • 01 APR 20:00Z
    Reviactyl: OAuth account takeover via auto-linking
    cvelistv5