CVE-2026-92985Public exploitNetwork attack vectorHinoki check available

Command execution via unescaped imported bookmark labels

Published Sep 17, 2026 · Updated Sep 17, 2026

Stored XSS in SiYuan before 3.8.4 allows remote attackers to execute commands through imported notebook bookmark labels. The notebook import path preserves raw bookmark HTML, which app/src/util/Tree.ts inserts into innerHTML without escaping. Exploitation requires importing a crafted notebook and displaying its bookmark dock; Electron exposes child_process for host command execution, while browser deployments expose session and note data within the application origin.

CVSS severity8.6
High
EPSS probability0.82%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in SiYuan before 3.8.4 allows remote attackers to execute commands through imported notebook bookmark labels. The notebook import path preserves raw bookmark HTML, which app/src/util/Tree.ts inserts into innerHTML without escaping. Exploitation requires importing a crafted notebook and displaying its bookmark dock; Electron exposes child_process for host command execution, while browser deployments expose session and note data within the application origin.

The record

CVE
CVE-2026-92985
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=0 <3.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.8.4

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.6SiYuan NoteCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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