CVE-2026-100638

high

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.

References

https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-setnotebookicon

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87732

Details

Source: Mitre, NVD

Published: 2026-09-26

Updated: 2026-09-30

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 7.6

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L

Severity: High

CVSS v4

Base Score: 8.3

Vector: 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

Severity: High

EPSS

EPSS: 0.00553