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.

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Fixes

Solution

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Workaround

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History

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 17 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description 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.
Title SiYuan before 3.8.4 Cross-Site Scripting via Document Title
First Time appeared B3log
B3log siyuan
Weaknesses CWE-79
CPEs cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Vendors & Products B3log
B3log siyuan
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-17T19:20:06.691Z

Reserved: 2026-09-17T13:55:54.288Z

Link: CVE-2026-92986

cve-icon Vulnrichment

Updated: 2026-09-17T19:18:17.507Z

cve-icon NVD

Status : Deferred

Published: 2026-09-17T15:17:02.033

Modified: 2026-09-17T20:18:59.970

Link: CVE-2026-92986

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses