Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 10 August 2021

We have updated the heroku-18 and heroku-20 stack images to pick up security fixes in upstream packages. The new stack images will be rolled out automatically over the next 24 hours. You do not need to redeploy your app or manually restart your dynos.

See this Dev Center article for an overview of the packages available in each stack image.

Changelog of packages

The following packages have been changed; a separate section for each stack (if applicable) lists packages that are only available at build time, but not at runtime.

Stack: heroku-18

  • Updated libmysqlclient20 from version 5.7.34-0ubuntu0.18.04.1 to 5.7.35-0ubuntu0.18.04.1
  • Updated linux-libc-dev from version 4.15.0-151.157 to 4.15.0-153.160

Updates to packages available at build time only

  • Updated libmysqlclient-dev from version 5.7.34-0ubuntu0.18.04.1 to 5.7.35-0ubuntu0.18.04.1

Stack: heroku-20

  • Updated libgnutls-openssl27 from version 3.6.13-2ubuntu1.3 to 3.6.13-2ubuntu1.6
  • Updated libgnutls30 from version 3.6.13-2ubuntu1.3 to 3.6.13-2ubuntu1.6
  • Updated libgnutlsxx28 from version 3.6.13-2ubuntu1.3 to 3.6.13-2ubuntu1.6
  • Updated libmysqlclient21 from version 8.0.25-0ubuntu0.20.04.1 to 8.0.26-0ubuntu0.20.04.2
  • Updated login from version 1:4.8.1-1ubuntu5.20.04 to 1:4.8.1-1ubuntu5.20.04.1
  • Updated passwd from version 1:4.8.1-1ubuntu5.20.04 to 1:4.8.1-1ubuntu5.20.04.1

Updates to packages available at build time only

  • Updated libgnutls-dane0 from version 3.6.13-2ubuntu1.3 to 3.6.13-2ubuntu1.6
  • Updated libgnutls28-dev from version 3.6.13-2ubuntu1.3 to 3.6.13-2ubuntu1.6
  • Updated libmysqlclient-dev from version 8.0.25-0ubuntu0.20.04.1 to 8.0.26-0ubuntu0.20.04.2