CVE-2026-86191 SiYuan before v3.8.2 Private Attribute View Key Enumeration
Attackers can enumerate private attribute view keys from hidden databases via the getAttributeViewKeysByID endpoint, exposing sensitive schema information.
- 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-2026-86191?
CVE-2026-86191 is a medium-severity vulnerability in siyuan-note siyuan, published on 5 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 an information disclosure vulnerability in the getAttributeViewKeysByID endpoint that allows publish readers to enumerate private attribute view key definitions without verifying parent database visibility. Attackers can access the endpoint to retrieve complete key schemas including sensitive field names and relation definitions from hidden databases.
Weakness: CWE-639
Which versions are affected by CVE-2026-86191?
How do I fix CVE-2026-86191?
No fix has been published for CVE-2026-86191 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86191 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86191 exists.
Sources
Also known as GHSA-5p8j-x73f-mfw4, GHSA-j4qq-w6qx-6839.