CVE-2026-44511 — Katalyst Koi: Session cookies can be replayed after user logout
Katalyst Koi is a framework for building Rails admin functionality. Prior to 4.20.0 and 5.6.0, admin session cookies were not invalidated when an admin user logged out. An attac…
Published: 2026-05-14 · CVSS: 7.4 · CVSS 3.1
Katalyst Koi is a framework for building Rails admin functionality. Prior to 4.20.0 and 5.6.0, admin session cookies were not invalidated when an admin user logged out. An attacker with access to a valid admin session cookie could continue to access admin functionality after logout, until the cookie expired or session secrets were rotated. This vulnerability is fixed in 4.20.0 and 5.6.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7