VYPR
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Critical severity9.6OSV Advisory· Published Jan 19, 2026· Updated Jun 17, 2026

CVE-2026-23852

CVE-2026-23852

Description

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.

AI Insight

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Affected products

2
  • Siyuan Note/SiyuanOSV2 versions
    dev2.0.17-2, v0.1.0, v0.1.1, …+ 1 more
    • (no CPE)range: dev2.0.17-2, v0.1.0, v0.1.1, …
    • (no CPE)range: <3.5.4

Patches

Vulnerability mechanics

References

2

News mentions

0

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