CVE-2026-100640

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

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 8,6

Source: [email protected]

Attack Vector: local

Attack Complexity: low

Privileges Required: none

User Interaction: none

Confidentiality: N/A

Integrity: N/A

Availability: N/A

MEDIUM 4,7

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: required

Scope: changed

Confidentiality: low

Integrity: none

Availability: none

Description

AI Translation Available

SiYuan before v3.8.4 contains an authorization omission in the siyuan-get IPC handler that allows remote-kernel renderers to access native clipboard formats by invoking clipboardReadMathML, clipboardReadOffice, and clipboardReadWPS commands with matching plaintext. Attackers controlling remote renderer content can obtain MathML formulas, Office bytes, and WPS bytes from local clipboard during user-mediated paste operations.

200

Exposure of Sensitive Information to an Unauthorized Actor

Draft

Abstraction: Class Structure: Simple

Common Consequences

Security Scopes Affected:

Confidentiality

Potential Impacts:

Read Application Data

Applicable Platforms

Technologies: Not Technology-Specific, Web Based, Mobile

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-mjmm-hgmc-m7qf