JetBrains Warns of Critical TeamCity Authentication Bypass Vulnerability Enabling Remote Code Execution

JetBrains issued a security warning about a critical authentication bypass vulnerability in TeamCity On-Premises that allows remote code execution. The flaw affects on-premises deployments of the TeamCity continuous integration and deployment server. No specific CVE ID, technical details, or exploitation instances were disclosed in the notice. The vulnerability poses a severe risk as it enables unauthenticated attackers to gain control over affected systems. JetBrains has not provided a patch release date or mitigation steps in the reported notice. The advisory was published by BleepingComputer.