Arbitrary File Read via html2BlockDOM file:// handling in SiYuan Desktop
CVE-2026-32938 affects SiYuan, a personal knowledge management system. In SiYuan desktop versions 3.6.0 and earlier, the /api/lute/html2BlockDOM endpoint processes pasted HTML containing file:// links and copies the referenced local files into the workspace assets directory. The vulnerable behavior does not validate the referenced paths against a sensitive-path allow/deny list before copying. Because the copied content becomes accessible through GET /assets/*path, which requires only authentication, an authenticated publish-service visitor can induce the desktop kernel to copy arbitrary readable local sensitive files and then retrieve them. The issue results in unauthorized exposure of local files from the host running the SiYuan desktop application. The vulnerability is fixed in version 3.6.1.
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