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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2025-14987)

ID	Name	Product	Family	Type	Severity
460683	Echo: go.temporal.io/server: security update to 1.27.4	Tenable Cloud Security	Echo Local Security Checks	Local	medium
460683	Echo: go.temporal.io/server: security update to 1.27.4	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
436547	SCA: security update for go.temporal.io/server (GHSA-hmhp-gh8m-c8xp)	Tenable Cloud Security	SCA Checks	Local	medium
436547	SCA: security update for go.temporal.io/server (GHSA-hmhp-gh8m-c8xp)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2025-14987

medium

Tenable Plugins

medium

medium

medium

medium