Is CVE-2026-103762 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103762?

CVE-2026-103762 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-103762

Description

SiYuan before v3.8.5 contains a missing authorization vulnerability in the getRefCreateSavePath, getShorthandSavePath, and getDocCreateSavePath endpoints that allows read-only publish visitors to learn unpublished notebook box IDs. Attackers with read-only or anonymous publish access can POST any open notebook ID to receive the global save-box ID and save-path template, revealing a hidden notebook's existence and creation time.