CVE-2026-42205: CWE-284: Improper Access Control in avo-hq avo
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.
AI Analysis
Technical Summary
CVE-2026-42205 describes a broken access control vulnerability (CWE-284) in the Avo framework for Ruby on Rails apps. The flaw exists in the ActionsController where insecure action lookup logic permits authenticated users to invoke any Action class (descendants of Avo::BaseAction) on any resource, regardless of whether the action is registered for that resource. This results in privilege escalation and unauthorized manipulation of application data. The vulnerability affects all versions prior to 3.31.2 and has been patched in that version.
Potential Impact
Exploitation of this vulnerability allows an authenticated user with limited privileges to perform unauthorized actions on any resource within the application, leading to full privilege escalation and potential data compromise or manipulation. The CVSS v3.1 score is 8.8 (High), reflecting the network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Avo framework to version 3.31.2 or later, where this access control vulnerability has been patched. No other mitigations are indicated or required once the update is applied.
CVE-2026-42205: CWE-284: Improper Access Control in avo-hq avo
Description
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.
CVSS v3.1
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42205 describes a broken access control vulnerability (CWE-284) in the Avo framework for Ruby on Rails apps. The flaw exists in the ActionsController where insecure action lookup logic permits authenticated users to invoke any Action class (descendants of Avo::BaseAction) on any resource, regardless of whether the action is registered for that resource. This results in privilege escalation and unauthorized manipulation of application data. The vulnerability affects all versions prior to 3.31.2 and has been patched in that version.
Potential Impact
Exploitation of this vulnerability allows an authenticated user with limited privileges to perform unauthorized actions on any resource within the application, leading to full privilege escalation and potential data compromise or manipulation. The CVSS v3.1 score is 8.8 (High), reflecting the network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Avo framework to version 3.31.2 or later, where this access control vulnerability has been patched. No other mitigations are indicated or required once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-25T05:04:37.027Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fe575bcbff5d86102f6124
Added to database: 05/08/2026, 21:36:27 UTC
Last enriched: 05/16/2026, 10:02:14 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 125
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