CVE-2026-23852: medium-severity vulnerability in siyuan-note siyuan
SiYuan vulnerable to Stored XSS / RCE via `setBlockAttrs` icon attribute
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.8epss 0.8%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P
Affected products
siyuan-note · siyuanRelated CVEs — siyuan-note siyuan
In the same product, most dangerous first.
CVE-2026-54069CRITICALSiYuan: Unauthenticated Admin API Access via Blanket chrome-extension:// Origin AllowlistEPSS 7.5%CVE-2026-54068MEDIUMSiYuan: Unauthenticated SQLite Data Exfiltration via Template Injection in /api/icon/getDynamicIconEPSS 4.3%CVE-2026-33476HIGHSiYuan has an Unauthenticated Arbitrary File Read via Path TraversalEPSS 3.3%CVE-2026-54066HIGHSiYuan: Path Traversal via Double URL Encoding in /assets/*path (publish mode arbitrary file─read)EPSS 2.2%CVE-2026-69084CRITICALSiYuan before v3.7.3 SQL Injection via searchEmbedBlockEPSS 1.6%CVE-2026-69085CRITICALSiYuan before v3.7.3 SQL Injection via searchDocsEPSS 1.4%