Katalyst vulnerabilities

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Published CVEs affecting Katalyst products: 1 record(s), with severity, exploitation and fixes.

Koi 1

Exploited only (KEV) →

CVE-2026-44511 High · 7.4 CWE-613 May 14, 2026

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 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.