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TI-2026-34114 Aliases CVE-2026-46400

HAXCMS PHP has a File Upload Validation Bypass

Priority HIGH 73CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00387 32nd percentileScored 2026-11-07
Fix Fixed haxcms-php (haxtheweb): 25.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
haxthewebhaxcms-php11.0.6 to before 25.0.025.0.0Patch availableCNA
  • haxcms-php Vendorhaxtheweb Affected 11.0.6 to before 25.0.0 Fixed in 25.0.0 Patch available CNA

Remediation

  • Fix · CNA haxcms-php (haxtheweb) Fixed in 25.0.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46400

References

Other 1

  • TI-2026-34109 HAX CMS Vulnerable to Private Key Disclosure via Broken HMAC Implementation CVSS 4.0CRITICAL 9.3
  • TI-2026-34105 HAX open-apis: Credential Theft via Server-Side Request Forgery (SSRF) in open-apis CVSS 4.0HIGH 8.7
  • TI-2026-27339 HAX CMS's public /server-status endpoint exposes authentication tokens, user activity, and client IP addresses CVSS 4.0HIGH 8.7
  • TI-2026-34113 Authenticated Remote Code Execution via File Overwrite CVSS 4.0CRITICAL 9.4
  • TI-2025-23152 HAX CMS PHP allows Insecure File Upload to Lead to Remote Code Execution CVSS 3.1CRITICAL 10.0
  • TI-2026-34194 HAX CMS: Stored XSS via '<video-player>' component allows arbitrary JavaScript execution and token theft CVSS 4.0CRITICAL 9.3
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences