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[USN-8572-1] Wget vulnerability

Posted on 21 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8572-1
July 20, 2026

wget vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Wget could be made to connect to unintended network resources.

Software Description:
- 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.

Update instructions:

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

Ubuntu 26.04 LTS
wget 1.25.0-2ubuntu4.3

Ubuntu 24.04 LTS
wget 1.21.4-1ubuntu4.4

Ubuntu 22.04 LTS
wget 1.21.2-2ubuntu1.4

Ubuntu 20.04 LTS
wget 1.20.3-1ubuntu2.1+esm3
Available with Ubuntu Pro

Ubuntu 18.04 LTS
wget 1.19.4-1ubuntu2.2+esm4
Available with Ubuntu Pro

Ubuntu 16.04 LTS
wget 1.17.1-1ubuntu1.5+esm4
Available with Ubuntu Pro

Ubuntu 14.04 LTS
wget 1.15-1ubuntu1.14.04.5+esm3
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8572-1
CVE-2026-15146

Package Information:
https://launchpad.net/ubuntu/+source/wget/1.25.0-2ubuntu4.3
https://launchpad.net/ubuntu/+source/wget/1.21.4-1ubuntu4.4
https://launchpad.net/ubuntu/+source/wget/1.21.2-2ubuntu1.4

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