Is CVE-2026-86191 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-86191?

CVE-2026-86191 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-86191

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.