What’s Vulnerable › Vulnerabilities
CVE-2026-44511: Katalyst Koi: Session cookies can be replayed after user logout
- Severity: high (CVSS 7.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-14 · updated 2026-10-26
- Weakness: CWE-613
Description
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.
Affected products
- katalyst koi: before 4.20.0; from 5.0.0 <= 5.6.0
References
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