SiYuan: Stored XSS results to Electron RCE in SiYuan marketplace via unescaped `data-obj` attribute (Bypass for CVE-2026-45375’s patch)_CVE-2026-55570

{
    "lastseen": "",
    "description": "SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, it does not escape the untrusted fields (name, version, author, description) when they are serialized into the data-obj HTML attribute of each marketplace card. Because the attribute is single-quoted and the value is produced with JSON.stringify() (which does not escape ', <, or >), a package whose name contains a single quote breaks out of the attribute and injects arbitrary HTML. In the desktop client the main BrowserWindow runs with nodeIntegration: true, contextIsolation: false, so the injected markup escalates from DOM XSS to arbitrary OS command execution. This is the same root cause and same impact as the original advisory, reached through a sibling sink the patch did not cover.  This vulnerability is fixed in 3.7.0.",
    "published": "2026-06-24T21:24:21.266Z",
    "modified": "2026-06-24T21:24:21.266Z",
    "type": "cve",
    "title": "SiYuan: Stored XSS results to Electron RCE in SiYuan marketplace via unescaped `data-obj` attribute (Bypass for CVE-2026-45375's patch)",
    "source": "GitHub_M",
    "references": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-x88j-wgpr-h22x",
    "id": "CVE-2026-55570",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79",
        "CWE-94",
        "CWE-116"
    ],
    "cvelist": null,
    "sourceData": "siyuan-note siyuan < 3.7.0",
    "sourceHref": "",
    "cvss": {
        "score": 9,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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": "siyuan",
    "version": "< 3.7.0",
    "vendor": "siyuan-note",
    "ai_description": "Stored XSS vulnerability in SiYuan marketplace via unescaped `data-obj` attribute, leading to Electron RCE",
    "ai_severity": "Critical",
    "ai_vendor": "SiYuan",
    "ai_product": "SiYuan",
    "ai_version": "< 3.7.0",
    "ai_score": 9
}