What is CVE-2026-92986?

CVE-2026-92986 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-09-17.

How severe is CVE-2026-92986?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Siyuan-Note Siyuan

CVE-2026-92986

SiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to execute scripts in the Electron renderer with access to child_process for command execution.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Siyuan-note Siyuan

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-92986?: CVE-2026-92986 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-09-17.
How severe is CVE-2026-92986?: High severity. CVSS v3 base score is 8.8 out of 10.