CVE-2026-85583 SiYuan before v3.8.2 Path Traversal via symlink in file API
Attackers with reader role can read arbitrary files outside the workspace by exploiting symlink handling in the file API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85583?
CVE-2026-85583 is a high-severity path traversal vulnerability in siyuan-note siyuan, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SiYuan versions before v3.8.2 contain a path traversal vulnerability in the reader-accessible file-read endpoint that follows symlinks when opening authorized asset paths. Attackers with reader role can request a logical asset under data/assets/ that is a symlink to a file outside the workspace and receive the target file bytes, bypassing workspace boundary restrictions.
Weakness: CWE-59
Which versions are affected by CVE-2026-85583?
How do I fix CVE-2026-85583?
No fix has been published for CVE-2026-85583 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-2026-85583 being exploited?
There is no known exploitation of CVE-2026-85583 in the wild and no public exploit code.
Sources
Also known as GHSA-g7gf-v79m-jwrm, GHSA-g886-mc2m-v27v.