# CVE-2026-46391

## Summary

- **CVE ID:** CVE-2026-46391
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N)
- **CWE:** CWE-183, CWE-918
- **Published:** Jun 5, 2026
- **Last Modified:** Jun 8, 2026

## Description

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 9.0.1 and prior to version 26.0.0 of @haxtheweb/open-apis, multiple functions conduct substring-only matching to validate hostnames to which basic authorization should be sent. An attacker can append the matched substrings to an attacker-controlled endpoint and capture authentication. Version 26.0.0 fixes the issue.

## Affected Products

- haxtheweb — @haxtheweb/open-apis (>= 9.0.1, < 26.0.0)

## References

- [CNA](https://github.com/haxtheweb/issues/security/advisories/GHSA-4fg7-f244-3j49)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.46%
- **EPSS Percentile:** 38.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._