The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

On NGINX Controller API Management versions 3.18.0-3.19.0, an authenticated attacker with access to the "user" or "admin" role can use undisclosed API endpoints on NGINX Controller API Management to inject JavaScript code that is executed on managed NGINX data plane instances. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.