Vulnerability Description
When system.enableCrossNamespaceCommands is enabled (on by default), the Temporal server permits certain workflow task commands (e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution) to target a different namespace than the namespace authorized at the gRPC boundary. The frontend authorizes RespondWorkflowTaskCompleted based on the outer request namespace, but the history service later resolves and executes the command using the namespace embedded in command attributes without authorizing the caller for that target namespace. This can allow a worker authorized for one namespace to create, signal, or cancel workflows in another namespace. This issue affects Temporal: through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.
Related Weaknesses (CWE)
References
- https://github.com/temporalio/temporal/releases/tag/v1.27.4
- https://github.com/temporalio/temporal/releases/tag/v1.28.2
- https://github.com/temporalio/temporal/releases/tag/v1.29.2
FAQ
What is CVE-2025-14987?
CVE-2025-14987 is a documented vulnerability. When system.enableCrossNamespaceCommands is enabled (on by default), the Temporal server permits certain workflow task commands (e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, Requ...
How severe is CVE-2025-14987?
CVSS scoring is not yet available for CVE-2025-14987. Check NVD for updates.
Is there a patch for CVE-2025-14987?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.