CVE-2026-55518

{"id": "CVE-2026-55518", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55518", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-20T15:18:54.194227Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.6, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "avo-hq", "product": "avo", "versions": [{"status": "affected", "version": ">= 4.0.0.beta.1, < 4.0.0.beta.51"}, {"status": "affected", "version": "< 3.32.1"}]}]}], "published": "2026-07-17T21:17:09.173", "references": [{"url": "https://github.com/avo-hq/avo/commit/995928e586fd1788dd496bd51c4dbe4a79cb2b9c", "source": "security-advisories@github.com"}, {"url": "https://github.com/avo-hq/avo/pull/4568", "source": "security-advisories@github.com"}, {"url": "https://github.com/avo-hq/avo/releases/tag/v3.32.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg", "source": "security-advisories@github.com"}, {"url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-862"}, {"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "Avo is a framework to create admin panels for Ruby on Rails apps. Prior to 3.32.1 and 4.0.0.beta.51, Avo's association attach workflow checks attach_<association>? in the UI and GET /resources/:resource/:id/:related/new path, but the actual write endpoint, POST /resources/:resource/:id/:related, does not run the same authorization check before mutating the association through Avo::AssociationsController#create. An authenticated low-privileged Avo user can bypass hidden or disabled attach controls and directly attach related records to a parent record by sending a crafted POST request, which can lead to privilege escalation and cross-tenant data exposure where associations represent authorization-bearing relationships. This issue is fixed in versions 3.32.1 and 4.0.0.beta.51."}, {"lang": "es", "value": "Avo es un framework para crear paneles de administraci\u00f3n para aplicaciones Ruby on Rails. Antes de 3.32.1 y 4.0.0.beta.51, el flujo de trabajo de adjuntar asociaciones de Avo verifica attach_[association]? en la UI y la ruta GET /resources/:resource/:id/:related/new, pero el endpoint de escritura real, POST /resources/:resource/:id/:related, no ejecuta la misma verificaci\u00f3n de autorizaci\u00f3n antes de mutar la asociaci\u00f3n a trav\u00e9s de Avo::AssociationsController#create. Un usuario de Avo autenticado con bajos privilegios puede eludir los controles de adjuntar ocultos o deshabilitados y adjuntar directamente registros relacionados a un registro padre enviando una solicitud POST manipulada, lo que puede llevar a una escalada de privilegios y exposici\u00f3n de datos entre inquilinos donde las asociaciones representan relaciones que conllevan autorizaci\u00f3n. Este problema est\u00e1 solucionado en las versiones 3.32.1 y 4.0.0.beta.51."}], "lastModified": "2026-10-24T20:10:00.137", "sourceIdentifier": "security-advisories@github.com"}