SiYuan: Broken access control in SiYuan `/api/tag/getTag` — Reader role can mutate `Conf.Tag.Sort` and persist to disk_CVE-2026-45147

{
    "lastseen": "",
    "description": "SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a configuration write that is normally guarded by both. Any authenticated user \u2014 including publish-service RoleReader accounts and RoleEditor accounts on a read-only workspace \u2014 can call this endpoint with a sort argument to mutate model.Conf.Tag.Sort and trigger model.Conf.Save(), which atomically rewrites the entire workspace conf.json. This vulnerability is fixed in 3.7.0.",
    "published": "2026-05-14T18:21:40.312Z",
    "modified": "2026-05-14T19:36:38.687Z",
    "type": "cve",
    "title": "SiYuan: Broken access control in SiYuan `/api/tag/getTag` \u2014 Reader role can mutate `Conf.Tag.Sort` and persist to disk",
    "source": "GitHub_M",
    "references": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6r88-8v7q-q4p2",
    "id": "CVE-2026-45147",
    "bulletinFamily": "",
    "cwe": [
        "CWE-285",
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "siyuan-note siyuan < 3.7.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "siyuan",
    "version": "< 3.7.0",
    "vendor": "siyuan-note",
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}