CVE-2026-54158
CriticalCVSS 9.9Exploitation Probability (EPSS)
Low risk21th percentile — higher than 21% of all known CVEs
Summary
A vulnerability in SiYuan before version 3.7.0 allows JavaScript injection via a crafted cell value in the attribute-view (database) renderer. An attacker with write access to a synced workspace can plant malicious content that executes arbitrary JavaScript when the victim opens the block-attribute panel. On Electron desktop with nodeIntegration enabled, this XSS can escalate to remote code execution (RCE) via require('child_process').
Risk Assessment
The risk includes full compromise of the victim's workstation (RCE) and propagation of the malicious payload to all devices syncing the affected workspace.
Recommendation
Immediately update SiYuan to version 3.7.0 or later. In the meantime, restrict write access to workspaces and avoid opening attribute panels from untrusted sources.
Original NVD description (English source)
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the attribute-view (database) cell renderer genAVValueHTML interpolates cell content raw in four of its branches: text, url, phone, and mAsset. A cell value like </textarea><img src=x onerror="..."> or "><img src=x onerror="..."> breaks out of its surrounding tag and runs arbitrary JavaScript in the renderer when the victim opens the block-attribute panel. On Electron desktop the renderer runs with nodeIntegration:true, so the XSS chains to host RCE via require('child_process'). AV files live under the workspace and ride normal sync, so an attacker with write access to any synced workspace plants the payload once and it fires on every device that opens a panel containing that row.he kernel doesn't escape on the way in either, so the malicious cell persists byte-for-byte. There's no equivalent of the html.EscapeAttrVal call that protects block IAL attributes at kernel/model/blockial.go:261. This vulnerability is fixed in 3.7.0.