The phrase "damaging report" refers to a written document that contains harmful or negative information, which can cause harm or negative consequences for someone or something. Full definition
The following week will see the government go to the high court to stop the potentially damaging report from being published. (politics.co.uk)
Those efforts also led to investigations and damaging reports about the mayor's fund - raising activities. (nytimes.com)
We knew that the defendants were holding out on us and saying that these specific very damaging reports did not exist despite the fact we had witnesses that testified to the contrary. (inc.com)