CVE-2026-27858_CVE-2026-27858

{
    "lastseen": "",
    "description": "Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory.\r\n Attacker can force managesieve-login to be unavailable by repeatedly crashing the process. Protect access to managesieve protocol, or install fixed version. No publicly available exploits are known.",
    "published": "2026-03-27T08:10:21.424Z",
    "modified": "2026-03-27T12:37:09.762Z",
    "type": "cve",
    "title": "CVE-2026-27858",
    "source": "OX",
    "references": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json",
    "id": "CVE-2026-27858",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Open-Xchange GmbH OX Dovecot Pro 0\nOpen-Xchange GmbH OX Dovecot Pro 0\nOpen-Xchange GmbH OX Dovecot Pro 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OX Dovecot Pro",
    "version": "0",
    "vendor": "Open-Xchange GmbH",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}