CVE-2026-53769: medium-severity vulnerability in avo-hq avo
Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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-2026-55518CRITICALAvo: Missing Authorization in Avo Association Attach Endpoint Allows Unauthorized Relationship Manipulation and Privilege EscalationEPSS 0.4%CVE-2026-42205HIGHAvo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across ResourcesEPSS 0.3%