CVE-2026-42205: high-severity vulnerability in avo-hq avo
Avo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across Resources
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
avo-hq · avoRelated CVEs — avo-hq avo
In the same product, most dangerous first.
CVE-2023-34102HIGHPossible unsafe reflection / partial denial of service in avoEPSS 1.6%CVE-2024-22191HIGHStored cross-site scripting (XSS) in `key_value` field in AvoEPSS 0.7%CVE-2024-22411MEDIUMCross site scripting in Action messages on AvoEPSS 0.7%CVE-2023-34103HIGHStored XSS (Cross Site Scripting) in html content based fields of avoEPSS 0.6%CVE-2026-53769MEDIUMAvo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policyEPSS 0.4%CVE-2026-55518CRITICALAvo: Missing Authorization in Avo Association Attach Endpoint Allows Unauthorized Relationship Manipulation and Privilege EscalationEPSS 0.4%