CVE-2026-59855: SiYuan: Store XSS To Rce via Asset.render

Severity: high (CVSS 8.6 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-09 · updated 2026-10-25
Weakness: CWE-80

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, Asset.render in app/src/asset/index.ts interpolates the unsanitized this.path value into HTML assigned to innerHTML, allowing a crafted asset link containing a double quote to break out of the src attribute, inject an event handler, and execute JavaScript that can run OS commands in the Electron renderer. This issue is fixed in versions 3.7.1-alpha.2 and 3.7.1.

Affected products

siyuan-note siyuan: before 3.7.1

References

https://github.com/siyuan-note/siyuan/commit/efbe3a557720034782643e55c9e0282530cb6bbb
https://github.com/siyuan-note/siyuan/releases/tag/v3.7.1
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w3gq-5j72-36vc
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w3gq-5j72-36vc

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