Jenkins 2.192: HTTP Error 403: No valid crumb was included in the request

Question

I recently upgraded to Jenkins 2.192, and my applications started failing with the following error:

HTTP Error 403: No valid crumb was included in the reques         


        

Answer 1

A simple solution without need of making changes to source code (validated with Jenkins v2.222):

1. Install the Strict Crumb Issuer plugin (https://plugins.jenkins.io/strict-crumb-issuer/)
2. Enable this plugin and uncheck 'Check the session ID' from its configuration (Under Jenkins Configure Global Security)

A drawback is that this solution makes us dependent on the Strict Crumb Issuer plugin and removes a security feature. But since our application requires many other plugins and only runs behind the firewall without Internet access, this is acceptable.