What’s Vulnerable › Vulnerabilities

CVE-2026-86191: SiYuan before v3.8.2 Private Attribute View Key Enumeration

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-05 · updated 2026-09-08
• Weakness: CWE-639

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.

Affected products

• siyuan-note siyuan: before 3.8.2 — fixed in 3.8.2

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.8.2. Check the vendor advisory for mitigations.

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-j4qq-w6qx-6839
• https://www.vulncheck.com/advisories/siyuan-before-3.8.2-private-attribute-view-key-enumeration
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-j4qq-w6qx-6839

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