---
id: CVE-2026-82650
title: >-
  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)
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
  restric…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-668
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82650'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9jfx-rc58-h23j
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-before-3.8.1-path-traversal-via-api-template-render
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-30T23:59:28.657Z'
epss: 0.0035
epssPercentile: 0.25981
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.