SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the WebSocket endpoint (/ws) allows unauthenticated connections when specific URL parameters are provided (?app=siyuan&id=auth&type=auth). This bypass, intended for the login page to keep the kernel alive, allows any external client — including malicious websites via cross-origin WebSocket — to connect and receive all server push events in real-time. These events leak sensitive document metadata including document titles, notebook names, file paths, and all CRUD operations performed by authenticated users. Combined with the absence of Origin header validation, a malicious website can silently connect to a victim's local SiYuan instance and monitor their note-taking activity. This issue has been fixed in version 3.6.1.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-287"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32815.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.6.1"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "1e370e37359778c0932673e825182ff555b504a3"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v3.6.1",
"range": [
{
"fixed": "fe4523fff2c84d6b06856331e735cc2938c2c5b0"
}
],
"source": "REFERENCES_TAG"
}
]
}