Medium 6.3Published Apr 1, 2026

CVE-2026-21629Joomla! Core - [20260301] - ACL hardening in com_ajax

Updated under an hour ago (Oct 26, 2026, 11:50 PM ET)

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It affects Joomla! Project Joomla! CMS and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Joomla! Project Joomla! CMS

Exploited in the last 30 days

The ajax component was excluded from the default logged-in-user check in the administrative area. This behavior was potentially unexpected by 3rd party developers.

CVSS: 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Joomla
NVD analysis: Analyzed
Record last updated: Apr 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Joomla! Project Joomla! CMS joomla_project:joomla_cms (from the name)	3.0.0-5.4.3; 6.0.0-6.0.3	CNA record
joomla joomla! joomla:joomla!	from 3.0.0 before 5.4.4; from 6.0.0 before 6.0.4	NVD

References

References

https://developer.joomla.org/security-centre/1027-20260301-core-acl-hardening-in-com-ajax.html	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.