High severity · published Aug 31, 2026
CVE-2026-78078
Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10
8.9
CVSS
0.4%
EPSS
No
On KEV
Description
Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10 - Image uploads previously validated only file extension and basic size parameters. Non-image files disguised with raster extensions could be uploaded. Added strict MIME verification and GD binary raster decoding (imagecreatefromstring) to reject invalid/malformed images fail-closed.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HU
Helix Ultimate extension for Joomla · joomshaper.com
1.0-2.2.9 · source: vendor
Affected product
HU
Helix Ultimate extension for Joomla
joomshaper.com
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78078
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78078
www.joomshaper.com
https://www.joomshaper.com/joomla-templates/helixultimate
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