CVE-2026-48939
critical CISA KEViCagenda Unrestricted Upload of File with Dangerous Type Vulnerability
Vendor / product: 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://www.icagenda.com/ security@joomla.org
- https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.icagenda.com/docs/changelog/icagenda-3-9-15 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.icagenda.com/docs/changelog/icagenda-4-0-8 134c704f-9b21-4f2e-91b3-4a467353bcc0