USN-8416-1: Go Networking vulnerability

Publication date

9 June 2026

Overview

Go Networking could allow unintended access to network services.


Packages

Details

It was discovered that Go Networking incorrectly handled certain
Punycode-encoded labels in the idna package. An attacker could possibly use
this issue to bypass hostname-based access restrictions.

It was discovered that Go Networking incorrectly handled certain
Punycode-encoded labels in the idna package. An attacker could possibly use
this issue to bypass hostname-based access restrictions.

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
20.04 LTS focal golang-go.net-dev –  1:0.0+git20190811.74dc4d7+dfsg-1ubuntu0.1~esm3  
golang-golang-x-net-dev –  1:0.0+git20190811.74dc4d7+dfsg-1ubuntu0.1~esm3  
18.04 LTS bionic golang-go.net-dev –  1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3  
golang-golang-x-net-dev –  1:0.0+git20170629.c81e7f2+dfsg-2ubuntu0.1~esm3  

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