CVE-2026-74801

Description

SiYuan before 3.7.4 fails to properly escape workspace directory paths when constructing command-line arguments for the elevated elevator.exe helper process. Attackers can create a malicious workspace directory with command metacharacters in its path and trigger the Microsoft Defender exclusion flow to execute arbitrary commands with administrator privileges after UAC approval.

CVSS Vector

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vmp7-pm7g-ghcc
• https://www.vulncheck.com/advisories/siyuan-before-local-privilege-escalation-via-elevator-exe
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vmp7-pm7g-ghcc