SiYuan is a personal knowledge management system. In versions 3.6.0 and below, SanitizeSVG has an incomplete blocklist — it blocks data:text/html and data:image/svg+xml in href attributes but misses data:text/xml and data:application/xml, both of which can render SVG with JavaScript execution. The unauthenticated /api/icon/getDynamicIcon endpoint serves user-controlled input (via the content parameter) directly into SVG markup using fmt.Sprintf with no escaping, served as Content-Type: image/svg+xml. This creates a click-through XSS: a victim navigates to a crafted URL, sees an SVG with an injected link, and clicking it triggers JavaScript via the bypassed MIME types. The attack requires direct navigation to the endpoint or
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-184",
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32940.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.6.1"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "d01d561875d4f744e9f6232f1d4831e3642b8696"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v3.6.1",
"range": [
{
"fixed": "fe4523fff2c84d6b06856331e735cc2938c2c5b0"
}
],
"source": "REFERENCES_TAG"
}
]
}