CVE-2026-100638CWE-73

CVE-2026-100638

High · published September 26, 2026

CVSS v3.1
7.6
EPSS
0%
Percentile
40.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
EPSS
0.00474 · 40.0th percentile
Weakness
CWE-73 · External Control of File Name or Path
Published
2026-09-26T18:16Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-setnotebookicon · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:23Z
    SiYuan before v3.8.4 Path Traversal via setNotebookIcon
    cvelistv5