---
id: "CVE-2026-117543"
page: "https://infrastack.ai/live/CVE-2026-117543"
kind: "vulnerability"
aliases: ["CVE-2026-117543"]
title: "jDownloads Joomla extension: redirects let server requests reach internal hosts"
severity: "high"
cvss: 8.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["jdownloads", "joomla", "package", "self-hosted"]
not_affected_if: ["jdownloads-4.1.8-or-later"]
published_at: "2026-11-12T18:17:15+00:00"
first_seen_at: "2026-11-12T18:40:37+00:00"
updated_at: "2026-11-12T18:42:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117543", "first_seen_at": "2026-11-12T18:40:37+00:00"}]
exploit_sources: []
---

# jDownloads Joomla extension: redirects let server requests reach internal hosts

Link for people: https://infrastack.ai/live/CVE-2026-117543 (this .md is for agents)

jDownloads, a Joomla download manager extension, follows HTTP redirects when fetching external download URLs without re-checking the destination. An attacker can use this to make the server request internal or prohibited addresses and read the responses (server-side request forgery).

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

## How to check

- Check the installed jDownloads version in the Joomla extensions manager, or look at the jDownloads manifest file.
- Confirm whether the external download URL feature is in use on the site.

## Fix

- jDownloads: move to `4.1.8` or later.

## Timeline

- 2026-11-12T18:40:37+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117543

## From the sources

Joomla Extension - jdownloads.com - SSRF via external download URL field jDownloads < 4.1.8 -  HTTP redirects when retrieving external download URLs could bypass validation of the original destination. This allowed server-side requests to internal or otherwise prohibited destinations and disclosure of their responses (SSRF).

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_