CVE-2026-59855Public exploitNetwork attack vector

Command execution via unsanitized asset path interpolation

Published Jul 9, 2026 · Updated Jul 9, 2026

DOM-based XSS in SiYuan before 3.7.1 allows remote attackers to execute OS commands when a user clicks a crafted asset link. Asset.render in app/src/asset/index.ts inserts this.path into an innerHTML template without HTML encoding, so a quote escapes the src attribute and adds an event handler. The default Electron renderer exposes Node.js with context isolation disabled, giving the injected handler direct child-process access after the link click.

CVSS severity8.6
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in SiYuan before 3.7.1 allows remote attackers to execute OS commands when a user clicks a crafted asset link. Asset.render in app/src/asset/index.ts inserts this.path into an innerHTML template without HTML encoding, so a quote escapes the src attribute and adds an event handler. The default Electron renderer exposes Node.js with context isolation disabled, giving the injected handler direct child-process access after the link click.

The record

CVE
CVE-2026-59855
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-80, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 3.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=< 3.7.1

Published CVSS scores

8.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1204.001Malicious Link

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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