CVE-2026-82650

Summary

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 Software

Weaknesses

• CWE-668: Exposure of Resource to Wrong Sphere

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9jfx-rc58-h23j
• https://www.vulncheck.com/advisories/siyuan-before-3.8.1-path-traversal-via-api-template-render

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