CVE-2026-44511

Katalyst Koi: Session cookies can be replayed after user logout

Published May 14, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-4cx3-3c38-j9vv katalyst-koi: Session cookies can be replayed after user logout
History
Type Values Removed Values Added
First Time appeared Katalyst
Katalyst koi
Vendors & Products Katalyst
Katalyst koi
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Katalyst Koi: Session cookies can be replayed after user logout
Weaknesses CWE-613
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 14, 2026, 6:34 PM
Reserved
May 6, 2026, 6:28 PM
Status
Deferred
Published
May 14, 2026, 5:16 PM
Modified
Oct 26, 2026, 12:10 AM