CVE-2026-100643

Published: Set 26, 2026 Last Modified: Set 28, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 8,5

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: low

User Interaction: active

Confidentiality: N/A

Integrity: N/A

Availability: N/A

HIGH 8,0

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: low

User Interaction: required

Scope: unchanged

Confidentiality: high

Integrity: high

Availability: high

Description

AI Translation Available

SiYuan versions before v3.8.4 fail to properly escape four stored Attribute View values in textarea elements, allowing authenticated attackers to inject JavaScript by modifying field descriptions, template sources, select option descriptions, or footer calculation templates. Attackers can execute stored JavaScript when other users open affected database menus, and in the Electron desktop app with nodeIntegration enabled, this leads to command execution with SiYuan process privileges.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Confidentiality Integrity Availability

Potential Impacts:

Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands

Applicable Platforms

Technologies: AI/ML, Web Based, Web Server

Likelihood of Exploit: High

View CWE Details

https://github.com/siyuan-note/siyuan/security/advisories/G…

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h3p6-c22r-fx2j