USN-8572-1: Wget vulnerability

Publication date

20 July 2026

Overview

Wget could be made to connect to unintended network resources.


Packages

  • wget - retrieves files from the web

Details

It was discovered that Wget did not properly validate the IP address
provided in an FTP PASV response when operating in FTP passive mode. A
remote attacker controlling a malicious FTP server, or an HTTP server
that redirects to an FTP URL, could possibly use this issue to redirect
Wget's data connection to an arbitrary address and perform server-side
request forgery, potentially accessing localhost services or internal
network resources.

It was discovered that Wget did not properly validate the IP address
provided in an FTP PASV response when operating in FTP passive mode. A
remote attacker controlling a malicious FTP server, or an HTTP server
that redirects to an FTP URL, could possibly use this issue to redirect
Wget's data connection to an arbitrary address and perform server-side
request forgery, potentially accessing localhost services or internal
network resources.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.04 LTS resolute wget –  1.25.0-2ubuntu4.3
24.04 LTS noble wget –  1.21.4-1ubuntu4.4
22.04 LTS jammy wget –  1.21.2-2ubuntu1.4
20.04 LTS focal wget –  1.20.3-1ubuntu2.1+esm3  
18.04 LTS bionic wget –  1.19.4-1ubuntu2.2+esm4  
16.04 LTS xenial wget –  1.17.1-1ubuntu1.5+esm4  
14.04 LTS trusty wget –  1.15-1ubuntu1.14.04.5+esm3  

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