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CVE-2026-18412— The OpenCart v4.2.0.0 extension installer contains a directory traversal vulnerability

Quick assessment

Affected
OpenCart OpenCart
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenCart是OpenCart公司开源的一款一套开源的电子商务系统。该系统提供产品评论、产品评分、产品添加等模块。 OpenCart 4.2.0.0版本存在路径遍历漏洞，该漏洞源于扩展安装器解压zip文件时未验证提取路径是否在预期目录内，导致路径遍历，可能允许攻击者将PHP Web Shell等文件写入webroot目录。

AI Predicted 9.8 Difficulty: Easy EPSS 0.54% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenCart OpenCart 4.2.0.0 affected
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I. Basic Information for CVE-2026-18412

Vulnerability Information
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Vulnerability Title
The OpenCart v4.2.0.0 extension installer contains a directory traversal vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
OpenCart extensions are uploaded as zip files with .ocmod.zip extensions. Upon installation, the OpenCart v4.2.0.0 extension installer extracts these zip files, but does not validate that the extracted paths stay inside the intended extraction directory. An attacker can craft a malicious extension containing file path traversal sequences, such as ../. With this vulnerability, an attacker can write files, such as a PHP web shell, into the webroot directory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
OpenCart 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenCart是OpenCart公司开源的一款一套开源的电子商务系统。该系统提供产品评论、产品评分、产品添加等模块。 OpenCart 4.2.0.0版本存在路径遍历漏洞，该漏洞源于扩展安装器解压zip文件时未验证提取路径是否在预期目录内，导致路径遍历，可能允许攻击者将PHP Web Shell等文件写入webroot目录。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenCart OpenCart 4.2.0.0 -

II. Public POCs for CVE-2026-18412

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III. Intelligence Information for CVE-2026-18412

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Vendor Advisories for CVE-2026-18412 (1)

IV. Related Vulnerabilities

Same product: OpenCart
Same vendor: OpenCart

V. Comments for CVE-2026-18412

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