Varonis security researchers uncovered a critical vulnerability in Google Dialogflow CX that exposed Code Block-enabled chatbots to cross-agent compromise within shared Google Cloud projects. An attacker with editing permissions on a single Dialogflow agent could exploit the flaw to access and control other Code Block-enabled agents in the same project environment.

The vulnerability granted attackers dangerous capabilities once established. They could intercept live user conversations, exfiltrate sensitive data shared during chatbot interactions, and inject malicious messages. This included social engineering attacks such as prompting users to re-enter passwords or other authentication credentials. The impact extended beyond individual agents, affecting any Code Block-enabled bot within the compromised project.

Dialogflow CX is a conversational AI platform that enterprises use to build customer service chatbots, virtual assistants, and automated support systems. Google Cloud projects often contain multiple agents serving different business functions, making this privilege escalation particularly dangerous for organizations operating several bots simultaneously.

The threat model assumes an insider threat or a compromised account with agent editing rights. An attacker in this position could laterally move through the project's agent infrastructure without needing additional credentials. The Code Block feature, which allows custom code execution within bot workflows, served as the attack vector enabling this cross-agent access.

Google has not yet disclosed the specific CVE identifier or patching timeline for this vulnerability in available reporting. The discovery by Varonis highlights ongoing security challenges in managed AI services where multiple autonomous agents share infrastructure. Organizations using Dialogflow CX should immediately review access controls for agent editing permissions and segregate agents across multiple Google Cloud projects where business logic permits.

Teams should audit which users and service accounts hold editing rights on production agents, implement principle of least privilege for agent management, and consider restricting Code Block usage to agents handling non-sensitive data until the vulnerability receives a patch. Monitoring agent activity logs for unauthorized configuration