What is CVE-2026-29183?

CVE-2026-29183 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-03-06.

How severe is CVE-2026-29183?

Critical severity. CVSS v3 base score is 9.3 out of 10.

XSS in Siyuan-note Siyuan

CVE-2026-29183

SiYuan is a personal knowledge management system. Prior to version 3.5.9, an unauthenticated reflected XSS vulnerability exists in the dynamic icon API endpoint "GET /api/icon/getDynamicIcon" when type=8, attacker-controlled content is emb…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (64.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.5.9

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6865-qjcf-286f (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-29183?: CVE-2026-29183 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-03-06.
How severe is CVE-2026-29183?: Critical severity. CVSS v3 base score is 9.3 out of 10.