Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-66395 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.6 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f	CISA-ADP	AdvisoryVendor
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f	[email protected]	AdvisoryVendor
https://www.vulncheck.com/advisories/siyuan-desktop-before-reflected-xss-to-rce-via-siyuan-protocol	[email protected]	AdvisoryVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
SiYuan	3.7.1 (semver)
CPE cpe:2.3:a:b3log:siyuan:::::::: Remediation Upgrade: v3.7.2moderate effort

Change History

4 change records found show changes

Date	Action	Recorded By
Sep 17, 2026	CVE Modified	[email protected]
Sep 17, 2026	CVE Modified	CISA-ADP
Jul 27, 2026	CVE Modified	CISA-ADP
Jul 27, 2026	New CVE Received	[email protected]