---
id: "CVE-2026-48939"
kind: "vulnerability"
aliases: ["CVE-2026-48939"]
title: "joomlic icagenda: A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment\u2026"
severity: "critical"
cvss: 10.0
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "iCagenda iCagenda", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "joomlic icagenda", "fixed": ["3.9.15"], "affected": ">= 3.2.1, < 3.9.15", "ecosystem": "vendor"}, {"name": "joomlic icagenda", "fixed": ["4.0.8"], "affected": ">= 4.0.0, < 4.0.8", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "icagenda", "joomla", "php", "runtime", "self-hosted"]
not_affected_if: ["icagenda-not-installed"]
published_at: "2026-06-20T13:16:42+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-48939", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48939", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# joomlic icagenda: A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment…

iCagenda, a Joomla event calendar extension, lets users upload arbitrary file types through its file attachment feature. An attacker can upload a PHP file and run it on the server, which gives them remote code execution.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:iCagenda iCagenda affected ? fixed ?
- vendor:joomlic icagenda affected >= 3.2.1, < 3.9.15 fixed 3.9.15
- vendor:joomlic icagenda affected >= 4.0.0, < 4.0.8 fixed 4.0.8

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-48939
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-48939

## From the sources

iCagenda contains an unrestricted upload of file with dangerous type vulnerability that allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.

CISA required action: 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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_