All vulnerabilities
CVE-2026-100638GHSA-6h8x-6mph-7438

SiYuan before v3.8.4 Path Traversal via setNotebookIcon

siyuan-note siyuan
Open in ThreatlineRecord JSON
CVSS
8.3High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 30 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.47%Chance of exploitation activity in the next 30 days, higher than 40% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.8.4Fixed versionCVE List
Published26 Sep 2026Updated 30 Sep 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 versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook parameter to escape the workspace data directory and write conf.json files to arbitrary locations accessible by the kernel process.

Text from CVE List

Affected versions 2

  • siyuanaffected: all versions before 3.8.4CVE List
  • siyuanunaffected: 3.8.4CVE List

References 2