CVE-2026-53769
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
- 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-862, CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pqpw-cvm4-8mv9 | RubyGems | avo | >=2.28.0 <3.32.0 | 3.32.0 |
References
- https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c
- https://github.com/avo-hq/avo/pull/4520
- https://github.com/avo-hq/avo/releases/tag/v3.32.0
- https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9
- https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9