# CVE-2026-71573

## Summary

- **CVE ID:** CVE-2026-71573
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L)
- **CWE:** CWE-93
- **Published:** Aug 18, 2026
- **Last Modified:** Aug 19, 2026

## Description

Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.

## Affected Products

- Joomla! Project — Joomla! CMS (4.0.0-5.4.6)
- Joomla! Project — Joomla! CMS (6.0.0-6.1.2)

## References

- [CNA](https://www.joomla.org/)
- [CNA](https://developer.joomla.org/security-centre/20260802-core-improper-cors-origin-validation.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 16.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._