CVE-2026-116167 SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter

High 7.6 Published 25 Oct 2026 Updated 26 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116167?

CVE-2026-116167 is a high-severity vulnerability in siyuan-note siyuan, published on 25 Oct 2026.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-116167?

How do I fix CVE-2026-116167?

No fix has been published for CVE-2026-116167 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116167 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-116167 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-fmj3-xc2f-6w4w, GHSA-jvrf-pm5c-jgr4.