CVE-2026-92986 SiYuan - Stored XSS

SiYuan before 3.8.4 contains a stored XSS caused by unescaped HTML in document titles in the backlink dock tree, letting attackers execute scripts in the Electron renderer with command execution, exploit requires attacker to set malicious titles via rename API or crafted notebooks.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.82% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Remote Code Execution, Client Script Exec
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 3.8.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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