CVE-2026-116167

Medium

Description

SiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-auth page that assigns the to parameter to window.location.href without scheme validation. Attackers can send a crafted link with a javascript: URI that executes after victim login, invoking kernel APIs to read or modify workspace content and settings.

SeverityMedium

CVSS6.8

Exploit probability52. percentile0.7%

ProductSiyuan

PublishedOct 25, 2026

First seenOct 25, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

siyuan-note siyuan3.8.7 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-fmj3-xc2f-6w4w

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	2.9.0 ≤ v < 3.8.7	3.8.7

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