CVE-2026-53769
Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy
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.
| CWE | CWE-862 CWE-863 |
| Vendor | avo-hq |
| Product | avo |
| Published | Sep 4, 2026 |
| Last Updated | Sep 9, 2026 |
Get instant alerts for avo-hq avo
Be the first to know when new medium vulnerabilities affecting avo-hq avo are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N