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USN-5625-1: Mako vulnerability

21 September 2022

Mako could be made to denial of service if it received a specially crafted regular expression.



  • mako - fast and lightweight templating for the Python platform


It was discovered that Mako incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.

Update instructions

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

Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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