CVE-2026-100638EPSS p38.8%

CVE-2026-100638CVE-2026-100638

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.

Scoring

CVSS 7.6 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L
EPSS0.47% probability of exploitation · percentile 38.8% · 2026-10-05T12:00:23Z
Last modified2026-09-30
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.