CVE-2026-75917 siyuan-note CVE debrief

Who should care

Users of SiYuan versions before v3.7.4 should assess their exposure and take necessary actions to update or mitigate the vulnerability. This includes administrators and users who utilize SiYuan for note-taking and collaboration.

Why it matters

CVE-2026-75917 is a critical vulnerability in SiYuan before v3.7.4, allowing for XSS-to-RCE escalation. Users and administrators should prioritize updating to v3.7.4 or later and assess their exposure to mitigate potential risks.

• Potential for arbitrary OS command execution
• Elevation of privileges through XSS escalation
• Risk of malicious document exploitation through sharing, sync, or import
• Need for verification of affected versions and configurations

Technical summary

The vulnerability exists in the file-tree picker's hover-tooltip generation in SiYuan versions before v3.7.4. The issue arises from the concatenation of document metadata fields into the aria-label HTML attribute without escaping, allowing for XSS. The XSS can be escalated to RCE due to the Electron BrowserWindow configuration. Affected product deployments should be identified in managed environments, and owners should be assigned for follow-up. The CVE record and vendor advisory should be reviewed to validate affected scope, severity, and vendor guidance.

Defensive priority

High priority should be given to updating SiYuan to version v3.7.4 or later. Users should assess their exposure, especially those using versions before v3.7.4, and verify the integrity of their installations.

Recommended defensive actions

• Update SiYuan to version v3.7.4 or later
• Assess exposure and verify installation integrity for versions before v3.7.4
• Implement compensating controls to monitor and restrict access to sensitive data and systems
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The vulnerability details are based on the CVE Program record and the source item from cve_program_cvelist_v5. The affected versions and configurations are specified in the source item. Evidence limits suggest verifying the integrity of SiYuan installations, especially for versions before v3.7.4, and assessing exposure to mitigate potential risks. Defenders should review the CVE record and vendor advisory for accurate affected scope and severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.