SiYuan before v3.8.4 Missing Authorization via siyuan-send-windows
SiYuan before v3.8.4 does not validate the sender or restrict recipients in the 'siyuan-send-windows' IPC handler of the Electron main process (app/electron/main.js). The handler ignores event.sender and forwards any received payload to every BrowserWindow returned by BrowserWindow.getAllWindows(), including windows belonging to other opened workspaces. A renderer connected to an attacker-controlled remote kernel can therefore send {cmd: "lockscreenByMode"} and have it delivered across the workspace boundary; a sibling workspace window whose lockScreenMode is set to 1 invokes lockScreen(). Repeated messages allow the remote workspace to repeatedly lock unrelated local workspace windows, causing a limited denial of service. No confidentiality, integrity, or code-execution impact was observed.
CVE-2026-100634
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100634
siyuan
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "siyuan-note",
"product": "siyuan",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.8.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.8.4",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/siyuan-note/siyuan/kernel",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-100634
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #12975 · Revision 1
- Added to Heist Feed
- Publisher date