{"id":"CVE-2026-53769","summary":"Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy","details":"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_\u003cfield\u003e? 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.","aliases":["GHSA-pqpw-cvm4-8mv9"],"modified":"2026-09-06T03:46:07.916313627Z","published":"2026-09-04T20:02:01.456Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-862","CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53769.json"},"references":[{"type":"WEB","url":"https://github.com/avo-hq/avo/releases/tag/v3.32.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53769.json"},{"type":"ADVISORY","url":"https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53769"},{"type":"FIX","url":"https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c"},{"type":"FIX","url":"https://github.com/avo-hq/avo/pull/4520"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/avo-hq/avo","events":[{"introduced":"39f6f8e1d24247749fdad1e1d1be13323f09f7c7"},{"fixed":"2aa06624ef6cf7bfd6657cf5b25a2afab29e189d"}],"database_specific":{"extracted_events":[{"introduced":"2.28.0"},{"fixed":"3.32.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.31.2","v3.31.1","v3.31.0","v3.30.4","v3.30.3","v3.30.2","v3.30.1","v3.30.0","v3.29.1","v3.29.0","v3.28.0","v3.27.0","v3.26.4","v3.26.3","v3.26.2","v3.26.1","v3.26.0","v3.25.3","v3.25.2","v3.25.1","v3.25.0","v3.24.1","v3.24.0","v3.23.1","v3.23.0","v3.22.5","v3.22.4","v3.22.3","v3.22.2","v3.22.1","v3.22.0","v3.21.0","v3.20.3","v3.20.2","v3.20.1","v3.20.0","v3.19.3","v3.19.2","v3.19.1","v3.19.0","v3.18.2","v3.18.0","v3.17.9","v3.17.8","v3.17.7","v3.17.6","v3.17.5","v3.17.4","v3.17.3","v3.17.2","v3.17.1","v3.17.0","v3.16.7","v3.16.6","v3.16.5","v3.16.4","v3.16.3","v3.16.2","v3.16.1","v3.16.0","v3.15.7","v3.15.6","v3.15.5","v3.15.4","v3.15.3","v3.15.2","v3.15.1","v3.14.3","v3.15.0","v3.14.5","v3.14.4","v3.14.2","v3.14.1","v3.14.0","v3.13.7","v3.13.6","v3.13.5","v3.13.4","v3.13.3","v3.13.2","v3.13.1","v3.13.0","v3.12.0","v3.11.10","v3.11.9","v3.11.8","v3.11.7","v3.11.6","v3.11.5","v3.11.4","v3.11.3","v3.11.2","v3.11.1","v3.11.0","v3.10.10","v3.10.9","v3.10.8","v3.10.7","v3.10.6","v3.10.5","v3.10.4","v3.10.3","v3.10.2","v3.10.1","v3.10.0","v3.9.2","v3.9.1","v3.8.2","v3.8.1","v3.8.0","v3.7.4","v3.7.3","v3.7.2","v3.7.1","v3.7.0","v3.6.4","v3.6.3","v3.6.2","v3.4.4","v3.4.3","v3.4.2","v3.4.1","v3.4.0","v3.3.6","v3.3.5","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.8","v3.0.7","v3.0.6","v3.0.5","v3.0.4","v3.0.2","v2.44.0","v2.43.0","v2.42.2","v2.42.1","v2.42.0","v2.41.0","v2.40.0","v2.39.0","v2.38.0","v2.37.2","v2.37.1","v2.37.0","v2.36.3","v2.36.2","v2.36.1","v2.36.0","v2.35.0","v2.34.6","v2.34.5","v2.34.4","v2.34.3","v2.34.2","v2.34.1","v2.34.0","v2.33.3","v2.33.2","v2.33.1","v2.33.0","v2.32.6","v2.32.5","v2.32.4","v2.32.3","v2.32.2","v2.32.1","v2.32.0","v2.31.0","v2.30.2","v2.30.1","v2.30.0","v2.29.1","v2.29.0","v2.28.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53769.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"}]}