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.
History

Wed, 09 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Mon, 07 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-639
References
Metrics threat_severity

None

threat_severity

Moderate


Sat, 05 Sep 2026 02:15:00 +0000

Type Values Removed Values Added
First Time appeared Avo Hq
Avo Hq avo
Vendors & Products Avo Hq
Avo Hq avo

Fri, 04 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy
Weaknesses CWE-862
CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-04T20:02:01.456Z

Updated: 2026-09-09T15:57:27.231Z

Reserved: 2026-06-10T17:48:40.547Z

Link: CVE-2026-53769

cve-icon Vulnrichment

Updated: 2026-09-09T15:57:01.209Z

cve-icon NVD

Status : Received

Published: 2026-09-04T21:17:25.300

Modified: 2026-09-09T16:17:03.117

Link: CVE-2026-53769

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-04T20:02:01Z

Links: CVE-2026-53769 - Bugzilla