Techniques for applying context-based security over interfaces in NG-RAN environments in mobile networks are disclosed. In some embodiments, a system/process/computer program product for applying context-based security over interfaces in NG-RAN environments in mobile networks includes monitoring network traffic on a mobile network at a security platform to identify a GTP-U tunnel session setup message associated with a new session; extracting a plurality of parameters from the GTP-U tunnel session setup message and from XnAP traffic to extract contextual information at the security platform; and enforcing a security policy at the security platform on the new session based on one or more of the plurality of parameters to apply context-based security to the network traffic transported between NG-RAN nodes in an NG-RAN environment in the mobile network.