CVE-2026-48939
iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability
iCagenda iCagenda
A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 10 July 2026. US federal agencies were required to remediate it by 13 July 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 82.5%, which is higher than 99.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-48939 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-48939.
What does CVE-2026-48939 affect?
CVE-2026-48939 affects iCagenda iCagenda. A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
How severe is CVE-2026-48939?
CVE-2026-48939 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 82.5%, higher than 99.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 13 July 2026.
How should organisations respond to CVE-2026-48939?
Apply the vendor patch for iCagenda iCagenda as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.