CVE-2026-86191

Medium

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductSiyuan

PublishedSep 5, 2026

First seenSep 5, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

siyuan-note siyuan3.8.2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-j4qq-w6qx-6839

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	v < 3.8.2	3.8.2

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