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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.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitHub_M




HIGH: 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-613: Insufficient Session Expiration

Product status

< 4.20.0
affected

>= 5.0.0 <= 5.6.0
affected

References

github.com/...st/koi/security/advisories/GHSA-4cx3-3c38-j9vv

cve.org (CVE-2026-44511)

nvd.nist.gov (CVE-2026-44511)

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