CVE-2026-85578 SiYuan through 3.8.1 Authorization Bypass via getFile
Attackers with reader role can access private workspace files in SiYuan by bypassing authorization checks on the getFile API endpoint.
- 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-2026-85578?
CVE-2026-85578 is a high-severity missing authorization 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 through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal configuration by knowing the hidden notebook identifier and file path.
Weakness: CWE-862
Which versions are affected by CVE-2026-85578?
How do I fix CVE-2026-85578?
No fix has been published for CVE-2026-85578 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-85578 being exploited?
There is no known exploitation of CVE-2026-85578 in the wild and no public exploit code.
Sources
Also known as GHSA-8ggq-wq3f-vxrw, GHSA-fv97-ww8v-fw2w.