CVE-2026-42205 HIGH

CVE-2026-42205: Avo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across Resources

Vendor Avo-Hq
Product avo
Weakness CWE-284
Published May 8, 2026
Last update May 12, 2026

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Avo is a framework to create admin panels for Ruby on Rails apps. Prior to version 3.31.2, a broken access control vulnerability was identified in the ActionsController of the Avo framework. Due to insecure action lookup logic, an authenticated user can execute any Action class (descendants of Avo::BaseAction) on any resource, even if the action is not registered for that specific resource. This leads to Privilege Escalation and unauthorized data manipulation across the entire application. This issue has been patched in version 3.31.2.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 12, 2026 Record updated