SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, the /snippets/*filepath route handler serveSnippets in kernel/server/serve.go joins a single-decoded request path with the snippets directory without subpath containment or sensitive-path checks, allowing an authenticated request such as /snippets/%2e%2e/%2e%2e/conf/conf.json to read workspace secrets and the document database. This issue is fixed in versions 3.7.1.

Affected: Go: github.com/siyuan-note/siyuan/kernel

Reporter: Cavan Loughran, Celvex Group Inc.

Summary ------- The /snippets/*filepath route handler serveSnippets in kernel/server/serve.go performs a bare filepath.Join(util.SnippetsPath, filePath) on the single-decoded c.Request.URL.Path and serves the result with c.File(), with NO IsSubPath containment and NO IsSensitivePath denylist - unlike the sibling /export/ (serveExport) and /appearance/ (serveAppearance) handlers, which both carry IsSubPath, and unlike /assets/ (serveAssets), whose traversal was fixed in GHSA-p4m3-mgmm-c664. Because util.SnippetsPath = WorkspaceDir/data/snippets, an authenticated request to GET /snippets/%2e%2e/%2e%2e/conf/conf.json resolves to WorkspaceDir/conf/conf.json and leaks the kernel API token and AccessAuthCode (the same secret file CVE-2026-30869 leaked from /export/); GET /snippets/%2e%2e/%2e%2e/temp/siyuan.db leaks the full document database.

Affected versions ----------------- v3.6.5 and current master (verified by direct source read). The /export/ and /assets/ fixes were endpoint-scoped and never reached serveSnippets.

Technical detail ---------------- Sink, kernel/server/serve.go, serveSnippets (verbatim, current master and v3.6.5):

func serveSnippets(ginServer *gin.Engine) { ginServer.Handle("GET", "/snippets/*filepath", model.CheckAuth, func(c *gin.Context) { filePath := strings.TrimPrefix(c.Request.URL.Path, "/snippets/") if !model.IsAdminRoleContext(c) { if "conf.json" == filePath {…