{"id":"CVE-2026-53769","state":"PUBLISHED","title":"Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy","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.","publishedAt":"2026-09-04T20:02:01.456Z","updatedAt":"2026-09-09T15:57:27.231Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["avo-hq avo"],"affected":[{"vendor":"avo-hq","product":"avo","versions":[{"version":">= 2.28.0, < 3.32.0","status":"affected"}]}],"references":["https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9","https://github.com/avo-hq/avo/pull/4520","https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c","https://github.com/avo-hq/avo/releases/tag/v3.32.0"],"weaknesses":["CWE-862","CWE-863"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53769.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53769","state":"PUBLISHED","datePublished":"2026-09-04T20:02:01.456Z","dateUpdated":"2026-09-09T15:57:27.231Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-10T17:48:40.547Z"},"containers":{"cna":{"title":"Avo: Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"avo-hq","product":"avo","versions":[{"version":">= 2.28.0, < 3.32.0","status":"affected"}]}],"references":[{"url":"https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9","name":"https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/avo-hq/avo/pull/4520","name":"https://github.com/avo-hq/avo/pull/4520","tags":["x_refsource_MISC"]},{"url":"https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c","name":"https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c","tags":["x_refsource_MISC"]},{"url":"https://github.com/avo-hq/avo/releases/tag/v3.32.0","name":"https://github.com/avo-hq/avo/releases/tag/v3.32.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-04T20:02:01.456Z"},"source":{"advisory":"GHSA-pqpw-cvm4-8mv9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-09T15:57:19.419562Z","id":"CVE-2026-53769","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-09T15:57:27.231Z"}}]}}}