CVE-2026-82650 SiYuan before v3.8.1 Path Traversal via /api/template/render
An authenticated attacker can read sensitive workspace files, including API tokens, via a path traversal vulnerability in the template rendering endpoint.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82650?
CVE-2026-82650 is a medium-severity path traversal vulnerability in siyuan-note siyuan, published on 30 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-668
Which versions are affected by CVE-2026-82650?
How do I fix CVE-2026-82650?
No fix has been published for CVE-2026-82650 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-82650 being exploited?
There is no known exploitation of CVE-2026-82650 in the wild and no public exploit code.
Sources
Also known as GHSA-9jfx-rc58-h23j, GHSA-j5w2-98qv-mp97.