Mattermost Server vulnerable to application crash from attacker-generated large response

Mattermost versions 9.10.x = 9.10.2, 9.11.x = 9.11.1 and 9.5.x = 9.5.9 fail to prevent detailed error messages from being displayed in Playbooks which allows an attacker to generate a large response and cause an amplified GraphQL response which in turn could cause the application to crash by...