CVE-2026-70374Network attack vector

Authenticated command execution via crafted media filename

Published Aug 5, 2026 · Updated Aug 5, 2026

OS command injection in HashBrown CMS 1.4.6 and earlier allows remote authenticated users to execute commands through a media upload. Media.generateThumbnail() appends Path.extname(filename) to a temporary path and passes it unescaped to AppService.exec(), while getMIMEType() validates only the portion before a question mark. Media-resource scope is required; a crafted image filename containing shell substitution executes with the Node.js process privileges.

CVSS severity8.8
High
EPSS probability0.97%
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 HashBrown CMS 1.4.6 and earlier allows remote authenticated users to execute commands through a media upload. Media.generateThumbnail() appends Path.extname(filename) to a temporary path and passes it unescaped to AppService.exec(), while getMIMEType() validates only the portion before a question mark. Media-resource scope is required; a crafted image filename containing shell substitution executes with the Node.js process privileges.

The record

CVE
CVE-2026-70374
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
HashBrown CMS
Product
HashBrown CMS
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <=1.4.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HashBrown CMS · HashBrown CMSversion=0 <=1.4.6

Published CVSS scores

8.8TuranSecCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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