CVE-2026-53769: Avo-Hq Avo

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Avo is a framework to create admin panels for Ruby on Rails apps. From version 2.28.0 to before version 3.32.0, Avo's direct attachment upload endpoint lacks server-side upload authorization and bypasses the documented field-level upload policy methods such as upload_{FIELD_ID}?. An authenticated Avo user who can reach the Avo attachment upload endpoint can replace or add attachment content, including binary content, filename, and content-type metadata, on a resolved record even when both update? and upload_<field>? policies deny the operation. This primarily affects multi-role Avo Pro/Advanced-style deployments where non-administrator or restricted operator users can reach Avo and per-record or per-field operations are expected to be enforced by policies. This issue has been patched in version 3.32.0.

Affected products

• Avo-Hq Avo: from 2.28.0, before 3.32.0 (fixed in 3.32.0)

Published 2026-09-04. Last modified 2026-09-30.