CVE-2026-70374

Received Received - Intake

OS Command Injection in HashBrown CMS

Publication date: 2026-08-05

Last updated on: 2026-08-10

Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Description

HashBrown CMS through 1.4.6 contains an OS Command Injection vulnerability (CWE-78) in the media upload thumbnail generation routine. Media.generateThumbnail in src/Server/Entity/Resource/Media.js builds a temporary file path as 'thumbnail' + Path.extname(filename) and passes it, unescaped, into a shell command executed via AppService.exec ('convert ' + tempFile + ...).

CVSS Scores

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Meta Information

Published

2026-08-05

Last Modified

2026-08-10

Generated

2026-08-16

AI Q&A

2026-08-05

EPSS Evaluated

2026-08-15

NVD

CVE-2026-70374

EUVD

EUVD-2026-53097

Affected Vendors & Products

Vendor	Product	Version / Range
hashbrowncms	hashbrown_cms	1.4.6
hashbrown_cms	hashbrown_cms	1.4.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

HashBrown CMS through 1.4.6 has an OS Command Injection vulnerability (CWE-78) in the media upload thumbnail generation. The system improperly handles filenames containing shell command substitutions, allowing an attacker to execute arbitrary commands on the server.

Detection Guidance

Check for suspicious media uploads with filenames containing command substitutions like 'x.jpg?$(command)' or similar patterns. Review logs for unexpected 'convert' command executions in the Node.js process context. Inspect media generation routines in src/Server/Entity/Resource/Media.js for unescaped file paths passed to shell commands.

Impact Analysis

An authenticated user with media resource scope can execute OS commands on the server hosting HashBrown CMS. This could lead to full system compromise, data theft, or unauthorized access to sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's security rules for protected health information. Organizations using affected versions may face compliance violations.

Mitigation Strategies

Upgrade to a patched version of HashBrown CMS if available. Temporarily disable media thumbnail generation until patched. Restrict media upload permissions to trusted users only. Monitor for unauthorized command executions in the Node.js process context.

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