by Kastro
Paper/Archive/CVE-2026-34456

CVE-2026-34456

reviactyl panel — Reviactyl: OAuth account takeover via auto-linking

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.1.401 × 208.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
panel>= 26.2.0-beta.1, < 26.2.0-beta.5–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/reviactyl/panel/security/advisories/GHSA-8mcf-rp68-xhfgrefgithub.com/reviactyl/panel/commit/fe0c29fc62fefe354c9ab8936dfe30fdb586a896refgithub.com/reviactyl/panel/releases/tag/v26.2.0-beta.5