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CVE-2026-65606

SiYuan before v3.7.2 Cross-Site Scripting to RCE

CVSS 4.0 9.4 CRITICALCVSS 3.1 9.6 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-65606

Published

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an <img onerror=...> element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-65606

Published

siyuan

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "siyuan-note",
                    "product": "siyuan",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:golang/github.com/siyuan-note/siyuan",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "3.7.2"
                        },
                        {
                            "version": "3.7.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON