CVE-2026-44511
Katalyst Koi: Session cookies can be replayed after user logout
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.
INFO
Published Date :
May 14, 2026, 5:16 p.m.
Last Modified :
Oct. 26, 2026, 12:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Katalyst Koi to version 4.20.0 or later.
- Update Katalyst Koi to version 5.6.0 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44511.
| URL | Resource |
|---|---|
| https://github.com/katalyst/koi/security/advisories/GHSA-4cx3-3c38-j9vv |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44511 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44511
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44511 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44511 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: koi de katalyst, Description: Katalyst Koi es un framework para construir funcionalidad de administración de Rails. Antes de 4.20.0 y 5.6.0, las cookies de sesión de administrador no se invalidaban cuando un usuario administrador cerraba sesión. Un atacante con acceso a una cookie de sesión de administrador válida podría seguir accediendo a la funcionalidad de administración después de cerrar sesión, hasta que la cookie expirara o se rotaran los secretos de sesión. Esta vulnerabilidad está corregida en 4.20.0 y 5.6.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'katalyst', 'product': 'koi', 'versions': [{'status': 'affected', 'version': '< 4.20.0'}, {'status': 'affected', 'version': '>= 5.0.0 <= 5.6.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44511', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-14T18:33:52.395978Z'} -
New CVE Received by [email protected]
May. 14, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-613 Added Reference https://github.com/katalyst/koi/security/advisories/GHSA-4cx3-3c38-j9vv