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CVE-2026-23852
Good to know:
Date: January 19, 2026
SiYuan is a personal knowledge management system. Versions prior to 3.5.4 have a stored Cross-Site Scripting (XSS) vulnerability that allows an attacker to inject arbitrary HTML attributes into the "icon" attribute of a block via the "/api/attr/setBlockAttrs" API. The payload is later rendered in the dynamic icon feature in an unsanitized context, leading to stored XSS and, in the desktop environment, potential remote code execution (RCE). This issue bypasses the previous fix for issue "#15970" (XSS → RCE via dynamic icons). Version 3.5.4 contains an updated fix.
Severity Score
Severity Score
Weakness Type (CWE)
Top Fix
Upgrade Version
Upgrade to version https://github.com/siyuan-note/siyuan.git - v3.5.4-dev3
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | REQUIRED |
| Scope (S): | CHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | HIGH |