CVE-2022-45026Public exploit

Arbitrary command execution via shell-enabled Mermaid export

Published Dec 7, 2022 · Updated Apr 23, 2025

OS command injection in Markdown Preview Enhanced 0.6.5 and 0.19.6 allows context-dependent attackers to execute commands during GFM export. The Mermaid PNG exporter passes the attacker-controlled pngFilePath argument to execFile with shell mode enabled, so shell syntax is interpreted. Exploitation requires a victim to open the crafted Markdown file and invoke Save as Markdown; commands run with that editor user’s privileges.

CVSS severity9.8
Critical
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Markdown Preview Enhanced 0.6.5 and 0.19.6 allows context-dependent attackers to execute commands during GFM export. The Mermaid PNG exporter passes the attacker-controlled pngFilePath argument to execFile with shell mode enabled, so shell syntax is interpreted. Exploitation requires a victim to open the crafted Markdown file and invoke Save as Markdown; commands run with that editor user’s privileges.

The record

CVE
CVE-2022-45026
Published
Dec 7, 2022
Updated
Apr 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004, T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell
T1204.002Malicious File

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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