Is CVE-2026-105205 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-105205?

CVE-2026-105205 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-105205

Description

SiYuan before 3.8.5 contains an information disclosure vulnerability that allows publish-mode readers to learn backlink block IDs and reference counts from password-protected and publish-disabled documents by querying a published document. Attackers can send POST requests to /api/block/getDocInfo or getDocsInfo for a published document ID to obtain refIDs and refCount of hidden referencing blocks, bypassing the publish confidentiality boundary.