Is CVE-2026-72803 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-72803?

CVE-2026-72803 has a CVSS v3 severity of MEDIUM (5.8).

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CVE-2026-72803

Description

SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.