CVE-2026-87814 SiYuan - Stored XSS

SiYuan < 3.8.2 contains a stored cross-site scripting vulnerability caused by failure to escape indexed asset content in the search asset preview feature, letting attackers execute JavaScript in the SiYuan origin, exploit requires attacker to place crafted text assets in a workspace.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 3.8.2 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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