NanaZip: Stack out-of-bounds read in NanaZip ZealFS bitmap parser_CVE-2026-42446

{
    "lastseen": "",
    "description": "NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a stack-based out-of-bounds read exists in the ZealFS filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted ZealFS v1 filesystem image. An attacker-controlled BitmapSize field in the file header drives an unbounded loop that reads past the end of a stack-allocated ZEALFS_V1_HEADER structure. This vulnerability is fixed in 6.0.1698.0.",
    "published": "2026-05-12T19:19:44.822Z",
    "modified": "2026-05-12T19:19:44.822Z",
    "type": "cve",
    "title": "NanaZip: Stack out-of-bounds read in NanaZip ZealFS bitmap parser",
    "source": "GitHub_M",
    "references": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-4c79-hfr4-mqv9",
    "id": "CVE-2026-42446",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "M2Team NanaZip >= 5.0.1250.0, < 6.0.1698.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L",
        "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": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "NanaZip",
    "version": ">= 5.0.1250.0, < 6.0.1698.0",
    "vendor": "M2Team",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}