CVE-2026-87810: Exposure of Sensitive Information to an Unauthorized Actor

Siyuan before v3.8.2 contains an information disclosure vulnerability in the POST /api/search/fullTextSearchBlock endpoint that filters private blocks from results but returns unfiltered match counts. Unauthenticated publish-mode readers can submit arbitrary search terms to learn whether matching...

CVE-2026-87808: Protection Mechanism Failure

SiYuan versions = 3.8.1 contain an incomplete fix for CVE-2026-32767 GHSA-j7wh-x834-p3r7. The prior fix commit d5e2d0bc added an administrator check for SQL mode method=2 in POST /api/search/fullTextSearchBlock, but the endpoint still does not enforce the application's read-only boundary: for...

CVE-2026-59834: Improper Neutralization of Special Elements used in an SQL Command

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, the block search endpoint POST /api/search/fullTextSearchBlock concatenates attacker-controlled paths values into SQL predicates used by non-SQL search modes, allowing an unauthenticated publish visitor to inject a UNI...