CVE-2026-71573 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Joomla! Project

Joomla! CMS

unaffected

Version	Status	Constraints
`4.0.0-5.4.6`	affected	—
`6.0.0-6.1.2`	affected	—

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://developer.joomla.org/security-centre/20260802-core-improper-cors-origin-validation.html
https://www.joomla.org/

History

Tue, 18 Aug 2026 16:30:00 +0000

Type	Values Removed	Values Added
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.
Title		Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2
Weaknesses		CWE-93
References		https://developer.joomla.org/security-centre/20260802-core-improper-cors-origin-validation.html https://www.joomla.org/
Metrics		cvssV4_0 `{'score': 6.9, 'vector': '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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: Joomla

Published: 2026-08-18T16:09:47.440Z

Updated: 2026-08-18T16:09:47.440Z

Reserved: 2026-08-07T13:04:49.114Z

Link: CVE-2026-71573

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-08-18T17:17:02.243

Modified: 2026-08-18T17:17:02.243

Link: CVE-2026-71573

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-93

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