CVE-2026-40871

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{"affected": [{"affectedData": [{"product": "mailcow-dockerized", "vendor": "mailcow", "versions": [{"status": "affected", "version": "< 2026-03b"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "mailcow: dockerized is an open source groupware/email suite based on docker. Versions prior to 2026-03b have a second-order SQL injection vulnerability in the quarantine_category field via the Mailcow API. The /api/v1/add/mailbox endpoint stores quarantine_category without validation or sanitization. This value is later used by quarantine_notify.py, which constructs SQL queries using unsafe % string formatting instead of parameterized queries. This results in a delayed (second-order) SQL injection when the quarantine notification job executes, allowing an attacker to inject arbitrary SQL. Using a UNION SELECT, sensitive data (e.g., admin credentials) can be exfiltrated and rendered inside quarantine notification emails. Version 2026-03b fixes the vulnerability."}, {"lang": "es", "value": "mailcow: dockerized es una suite de groupware/correo electr\u00f3nico de c\u00f3digo abierto basada en docker. Las versiones anteriores a 2026-03b tienen una vulnerabilidad de inyecci\u00f3n SQL de segundo orden en el campo quarantine_category a trav\u00e9s de la API de Mailcow. El endpoint /api/v1/add/mailbox almacena quarantine_category sin validaci\u00f3n ni saneamiento. Este valor es utilizado posteriormente por quarantine_notify.py, que construye consultas SQL utilizando formato de cadena % inseguro en lugar de consultas parametrizadas. Esto resulta en una inyecci\u00f3n SQL retrasada (de segundo orden) cuando se ejecuta el trabajo de notificaci\u00f3n de cuarentena, permitiendo a un atacante inyectar SQL arbitrario. Usando un UNION SELECT, los datos sensibles (p. ej., credenciales de administrador) pueden ser exfiltrados y renderizados dentro de los correos electr\u00f3nicos de notificaci\u00f3n de cuarentena. La versi\u00f3n 2026-03b corrige la vulnerabilidad."}], "id": "CVE-2026-40871", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40871", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-21T19:53:34.653739Z", "version": "2.0.3"}}]}, "published": "2026-04-21T20:17:00.527", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-r8fq-wrfm-cj2q"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-r8fq-wrfm-cj2q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-89"}, {"lang": "en", "value": "CWE-116"}, {"lang": "en", "value": "CWE-564"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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