vincbeck opened a new pull request, #54926:
URL: https://github.com/apache/airflow/pull/54926

   Resolves #53936.
   
   Follow-up of #54197.
   
   The way `FabAuthManager` checks for Dag permission is partially broken in 
multiple ways:
   
   1. To check whether user is authorized to list Dags, we are calling 
`get_authorized_dag_ids` (which returns the list of Dags the user is authorized 
to access) and checking whether this list is not empty. Even though this is not 
strictly wrong, it is not good either. A more robust solution proposed by 
@pierrejeambrun (see thread 
[here](https://github.com/apache/airflow/pull/54197#pullrequestreview-3101266838)
 for more information about the solution but also the reason why it is better) 
is to check whether the user has either access to all Dags or at least one dag 
permission with `RESOURCE_DAG_PREFIX`
   2. I remove `RESOURCE_DAG_RUN_PREFIX` because I think this is very wrong. 
The purpose of this constant (value is `DAG Run:`) is to be able to give access 
to Dag runs of specific Dags. Example: To give read access to user `X` of Dag 
runs of Dag `test`, I can add to the user's permissions `(CAN_READ, DAG 
Run:test)`. But this is possible without this constant, using the same example, 
to grant the user access to Dag `test` runs, you can give them `(CAN_READ, 
Dag:test)` and `(CAN_READ, RESOURCE_DAG_RUN)`.
   
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