CVE-2026-70375
Received Received - Intake

OS Command Injection in HashBrown CMS

Publication date: 2026-08-05

Last updated on: 2026-08-05

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

Description
HashBrown CMS through 1.4.6 contains an OS Command Injection vulnerability (CWE-78) in the Git deployer component. GitDeployer.pullRepo() in src/Server/Entity/Deployer/GitDeployer.js executes AppService.exec(`git checkout ${this.branch || 'master'}`), interpolating the configured branch value directly into a shell command with no escaping. GitDeployer.validate() only rejects a single-quote character in the repo, branch, username, and password fields; shell metacharacters such as ';', '&&', '|', backticks, and '$()' are not filtered. A user able to configure a project's Git deployer settings can set a malicious branch value (e.g. 'master;<command>#') that executes automatically on every subsequent deployer operation (media upload, content save, etc.), since pullRepo() is invoked unconditionally at the start of each such operation. This is related to CVE-2020-6948, which addressed single-quote escaping of the repo, username, and password fields in the same file's git clone invocation; the branch field used in the unquoted git checkout command was not covered by that fix and remains injectable.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-70375
EUVD
EUVD-2026-53098

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
hashbrown_cms hashbrown_cms 1.4.6
hashbrowncms hashbrown_cms 1.4.6

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

HashBrown CMS through 1.4.6 has an OS Command Injection vulnerability in the Git deployer component. The GitDeployer.pullRepo() function executes a shell command with user-controlled input without proper escaping. Attackers can inject malicious commands via the branch configuration, which executes automatically during deployer operations like media uploads or content saves.

Detection Guidance

Check for unauthorized Git deployer configurations in HashBrown CMS projects. Inspect branch names for shell metacharacters like ;, &&, |, backticks, or $(). Look for unexpected system commands in logs or process execution.

Impact Analysis

An attacker with access to configure Git deployer settings could execute arbitrary commands on the server. This could lead to full system compromise, data theft, or unauthorized modifications. The attack is persistent as the malicious branch value remains active across deployer operations.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR's integrity and confidentiality requirements or HIPAA's security rules. Organizations using HashBrown CMS may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Update HashBrown CMS to the latest version beyond 1.4.6. Remove or disable the Git deployer component if unused. Restrict write access to deployer settings to trusted users only.

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