CVE-2026-42205

Avo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across Resources

Published May 8, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qc5p-3mg5-9fh8 Avo: Broken Access Control Through Unauthorized Execution of Arbitrary Action Classes Across Resources
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Avo Hq
Avo Hq avo
Vendors & Products Avo Hq
Avo Hq avo
Type Values Removed Values Added
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.
Title Avo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across Resources
Weaknesses CWE-284
CWE-639
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 12, 2026, 6:31 PM
Reserved
Apr 25, 2026, 5:04 AM
Status
Deferred
Published
May 8, 2026, 10:16 PM
Modified
Jun 17, 2026, 10:47 AM