CVE-2026-100637EPSS p38.8%

CVE-2026-100637CVE-2026-100637

Description

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.

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 modified2026-10-05
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.