CVE-2026-82650: Siyuan-Note Siyuan

Medium severity, CVSS 4.4. EPSS: 0.4% chance of exploitation in the next 30 days.

SiYuan 3.8.0 contains a path traversal / sensitive file exposure vulnerability in the RenderTemplate function (kernel/model/template.go), reachable via the POST /api/template/render endpoint (kernel/api/template.go). The endpoint restricts the supplied path only to the workspace directory (util.IsAbsPathInWorkspace) but, unlike the file API's refuseToAccess() blocklist, applies no sensitive-path exclusion. This allows an authenticated attacker to read sensitive workspace files, including conf/conf.json, which contains the API token and cookie signing key. The issue is fixed in v3.8.1.

Affected products

• Siyuan-Note Siyuan: before 3.8.1 (fixed in 3.8.1)

Published 2026-08-30. Last modified 2026-08-31.