Versions of the package asyncua before 0.9.96 are vulnerable to Denial of Service (DoS) such that an attacker can send a malformed packet and as a result, the server will enter into an infinite loop and consume excessive memory.

Versions of the package asyncua before 0.9.96 are vulnerable to Improper Authentication such that it is possible to access Address Space without encryption and authentication. **Note:** This issue is a result of missing checks for services that require an active session.