CVE-2026-65606Public exploitNetwork attack vector

User-assisted command execution via unescaped tab icon

Published Jul 23, 2026 · Updated Jul 23, 2026

Cross-site scripting in SiYuan Desktop before 3.7.2 allows remote attackers to execute operating-system commands through a malicious link. An uninstalled-plugin siyuan:// URL passes its icon parameter to app/src/layout/Tab.ts, which builds the tab header with innerHTML without escaping the value. Opening the link is required; the injected event handler runs with the desktop user's privileges because the Electron renderer exposes Node.js require.

CVSS severity9.4
Critical
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in SiYuan Desktop before 3.7.2 allows remote attackers to execute operating-system commands through a malicious link. An uninstalled-plugin siyuan:// URL passes its icon parameter to app/src/layout/Tab.ts, which builds the tab header with innerHTML without escaping the value. Opening the link is required; the injected event handler runs with the desktop user's privileges because the Electron renderer exposes Node.js require.

The record

CVE
CVE-2026-65606
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-94, CWE-79, T1204.001, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.7.2

Published CVSS scores

9.6VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.4VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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