Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mjmm-hgmc-m7qf
- https://www.vulncheck.com/advisories/siyuan-before-3.8.4-clipboard-data-disclosu
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mjmm-hgmc-m7qf
FAQ
What is CVE-2026-100640?
CVE-2026-100640 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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, clipboardR...
How severe is CVE-2026-100640?
CVE-2026-100640 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-100640?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.