What is CVE-2026-116167?

CVE-2026-116167 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-10-25.

How severe is CVE-2026-116167?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Siyuan-Note Siyuan

CVE-2026-116167

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-25 · last modified 2026-10-25.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Siyuan-Note Siyuan

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/siyuan-note/siyuan/security/advisories/GHSA-fmj3-xc2f-6w4w (vendor-advisory)
www.vulncheck.com/advisories/siyuan-2.9.0-before-3.8.7-xss-via-check-auth-to-pa… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116167?: CVE-2026-116167 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-10-25.
How severe is CVE-2026-116167?: Medium severity. CVSS v3 base score is 6.8 out of 10.