CVE-2026-100638

HIGH 7.6

SiYuan before v3.8.4 Path Traversal via setNotebookIcon

CVSS Score

7.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-73
Vendor	siyuan-note
Product	siyuan
Published	Sep 26, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

Low

Affected Versions

siyuan-note / siyuan

0 < 3.8.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438 vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-setnotebookicon

Credits

🔍 manus-use