Attackers are actively targeting Orkes Conductor servers vulnerable to CVE-2026-58138, a critical unauthenticated remote code execution vulnerability in its GraalVM script evaluators. FortiGuard telemetry is observing active attack attempts targeting vulnerable Orkes Conductor deployments.
The vulnerability allows an unauthenticated attacker to submit a malicious workflow definition containing JavaScript or Python expressions to the Conductor workflow API. Because vulnerable evaluators can be configured with unrestricted host access, the attacker can escape the intended scripting environment and execute arbitrary operating system commands with the privileges of the Conductor process.
Public proof-of-concept exploit code is available, including a working exploit targeting Conductor v3.23.0. Exploit material has also been published through Exploit-DB, increasing the likelihood of opportunistic scanning and exploitation of exposed deployments.