mailcow: dockerized vulnerable to Second Order SQL Injection in quarantine category via API_CVE-2026-40871

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-21T19:12:52.781Z",
    "modified": "2026-04-21T20:36:30.751Z",
    "type": "cve",
    "title": "mailcow: dockerized vulnerable to Second Order SQL Injection in quarantine category via API",
    "source": "GitHub_M",
    "references": "https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-r8fq-wrfm-cj2q",
    "id": "CVE-2026-40871",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-89",
        "CWE-116",
        "CWE-564"
    ],
    "cvelist": null,
    "sourceData": "mailcow mailcow-dockerized < 2026-03b",
    "sourceHref": "",
    "cvss": {
        "score": 7.2,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "mailcow-dockerized",
    "version": "< 2026-03b",
    "vendor": "mailcow",
    "ai_description": "",
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    "ai_score": 0
}