CVE-2026-73048: SiYuan before v3.7.4 Information Disclosure via getRefIDsByFileAnnotationID
SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the getRefIDsByFileAnnotationID endpoint that returns block identifiers citing PDF annotations without publish-access filtering. Attackers can extract block identifiers from restricted documents by supplying annotation identifiers visible in published pages, revealing citation relationships across forbidden and password-protected tiers.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
SiYuanto a version that resolves this vulnerability.Fixed in 3.7.4 - Compensating control
If users can access the getRefIDsByFileAnnotationID endpoint, ensure access is restricted so that annotations/block identifiers are only returned when the requester has publish-access to the cited PDF annotations (no cross-tier/citation leakage).