calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution_CVE-2026-26064

{
    "lastseen": "",
    "description": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows, this leads to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. Function extract_pictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via _get_targetpath(), but extract_pictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.",
    "published": "2026-02-20T01:44:34.137Z",
    "modified": "2026-02-20T01:44:34.137Z",
    "type": "cve",
    "title": "calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution",
    "source": "GitHub_M",
    "references": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp\nhttps://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62",
    "id": "CVE-2026-26064",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "kovidgoyal calibre < 9.3.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "calibre",
    "version": "< 9.3.0",
    "vendor": "kovidgoyal",
    "ai_description": "Path Traversal vulnerability allowing arbitrary file writes and Remote Code Execution",
    "ai_severity": "Critical",
    "ai_vendor": "kovidgoyal",
    "ai_product": "calibre",
    "ai_version": "9.2.1 and below",
    "ai_score": 9.3
}