CVE-2026-71573: 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…

PriorityP346high8.3CVSS 3.1

AVNACLPRNUINSCCLILAL

EPSS

0.25%

16.6th percentile

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

4 ranges

Vendor	Product	Version range	Fixed in
joomla!_project	joomla!_cms	—	—
joomla!_project	joomla!_cms	—	—
joomla	joomla_!	>= 4.0.0 < 5.4.8	5.4.8
joomla	joomla_!	>= 6.0.0 < 6.1.3	6.1.3

CVSS provenance

nvdv3.18.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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