CVE-2026-100640
SiYuan before v3.8.4 Clipboard Data Disclosure via IPC
- State
- Published
- Severity
- 8.6 High
- Published
- Sep 26, 2026
- Updated
- Oct 27, 2026
- Reserved
- Sep 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.7 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-mjmm-hgmc-m7qf)vendor-advisory
- VulnCheck Advisory: SiYuan before v3.8.4 Clipboard Data Disclosure via IPCthird-party-advisory
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