Remote Code Execution in SzafirHost_CVE-2026-44088

{
    "lastseen": "",
    "description": "SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded.\n\n\nThis issue was fixed in version 1.2.1.",
    "published": "2026-05-15T08:48:11.694Z",
    "modified": "2026-05-15T08:48:11.694Z",
    "type": "cve",
    "title": "Remote Code Execution in SzafirHost",
    "source": "CERT-PL",
    "references": "https://cert.pl/posts/2026/05/CVE-2026-44088\nhttps://www.elektronicznypodpis.pl/",
    "id": "CVE-2026-44088",
    "bulletinFamily": "",
    "cwe": [
        "CWE-434"
    ],
    "cvelist": null,
    "sourceData": "Krajowa Izba Rozliczeniowa SzafirHost 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L",
        "version": "4.0"
    },
    "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": "SzafirHost",
    "version": "0",
    "vendor": "Krajowa Izba Rozliczeniowa",
    "ai_description": "Remote code execution vulnerability in SzafirHost due to signature verification bypass",
    "ai_severity": "High",
    "ai_vendor": "Krajowa Izba Rozliczeniowa",
    "ai_product": "SzafirHost",
    "ai_version": "0",
    "ai_score": 8.6
}