All vulnerabilities
CVE-2026-105205GHSA-v758-8w88-pfr2

SiYuan before 3.8.5 Information Disclosure via /api/block/getDocInfo and getDocsInfo

siyuan-note siyuan
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 5 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 12% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.8.5Fixed versionCVE List
Published4 Oct 2026Updated 5 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • siyuanaffected: all versions before 3.8.5CVE List
  • siyuanunaffected: 3.8.5CVE List

References 2