CVE-2026-23733Public exploitNetwork attack vector

Remote command execution via unsanitized Mermaid content

Published Jan 18, 2026 · Updated Jan 18, 2026

Stored XSS in LobeHub before 2.0.0-next.180 allows remote attackers to run system commands through a rendered Mermaid artifact. The artifact Renderer passes user- or AI-generated content directly to Mermaid without sanitization, so HTML event handlers execute in the application DOM and can invoke the exposed electronAPI IPC bridge. A victim must render the malicious artifact in the Electron desktop client; commands then run on the victim's machine with the client's privileges.

CVSS severity9.6
Critical
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in LobeHub before 2.0.0-next.180 allows remote attackers to run system commands through a rendered Mermaid artifact. The artifact Renderer passes user- or AI-generated content directly to Mermaid without sanitization, so HTML event handlers execute in the application DOM and can invoke the exposed electronAPI IPC bridge. A victim must render the malicious artifact in the Electron desktop client; commands then run on the victim's machine with the client's privileges.

The record

CVE
CVE-2026-23733
Published
Jan 18, 2026
Updated
Jan 18, 2026
Vendor
LobeHub
Product
LobeHub
Classifications
CWE-94, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 18, 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=< 2.0.0-next.180

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LobeHub · LobeHubversion=< 2.0.0-next.180

Published CVSS scores

9.6LobeHubCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
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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