HAXCMS PHP has a File Upload Validation Bypass_CVE-2026-46400

8.7 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Description

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 11.0.6 and prior to version 25.0.0, the file upload functionality in HAXCMS PHP only validates file extensions using a regex pattern without checking the actual file content or MIME type. This allows attackers to upload malicious files (e.g., PHP webshells) disguised as legitimate image files, potentially leading to remote code execution. Version 25.0.0 contains a fix for the issue.

Basic Information

ID CVE-2026-46400

Source GitHub_M

Published Jun 5, 2026 at 19:15

Affected Product

Vendor haxtheweb

Product haxcms-php

Version >= 11.0.6, < 25.0.0

Affected Versions haxtheweb haxcms-php >= 11.0.6, < 25.0.0

CWE Classification

CWE-434

References

github.com /haxtheweb/issues/security/advisories/GHSA-ffxv-9qv2-v2v8

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    "published": "2026-06-05T19:15:29.745Z",
    "modified": "2026-06-05T19:15:29.745Z",
    "type": "cve",
    "title": "HAXCMS PHP has a File Upload Validation Bypass",
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