High 7.1Published Sep 29, 2026

CVE-2026-92231Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3

Updated under an hour ago (Oct 27, 2026, 7:30 PM ET)

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It affects Joomla! Project Joomla! CMS and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The checkAttribute method normalized an attribute value before testing it against the "javascript:" scheme regex, however without decoding HTML5 entities beforehand, causing an XSS vector.

CVSS: 7.1 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-79
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: Sep 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Joomla! Project Joomla! CMS joomla_project:joomla_cms (from the name)	1.5.0-5.4.8; 6.0.0-6.1.3	CNA record
Joomla! Project Joomla! Framework Filter package joomla_project:joomla_framework_filter_package (from the name)	1.0.0-3.0.6; 4.0.0-4.1.0	CNA record
joomla joomla! joomla:joomla!	from 1.5.0 before 5.4.8; from 6.0.0 before 6.1.3	NVD

References

References

https://www.joomla.org/	product
https://developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decode-mismatch.html	vendor-advisory, patch

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.