Path Traversal Vulnerability in OpenCart Extensions by OpenCart
CVE-2026-18412

9.1CRITICAL

Key Information:

Vendor

Opencart

Status
Opencart
Vendor
CVE Published:
10 August 2026

What is CVE-2026-18412?

OpenCart allows the installation of extensions via zip files with .ocmod.zip extensions. In version 4.2.0.0, the extension installer inadequately validates the extracted paths, enabling an attacker to leverage crafted malicious extensions containing traversal sequences (e.g., ../) to write files to unintended directories, such as the webroot. This can lead to severe security risks, including the potential deployment of PHP web shells.

Affected Version(s)

OpenCart 4.2.0.0

References

https://kb.cert.org/vuls/id/614868

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.