Summary
Temporal has an Incorrect Authorization vulnerability
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.
Impact
The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions. Typical impact: unauthorized data access or execution of privileged operations.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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go.temporal.io/server to 1.27.4 or later; go.temporal.io/server to 1.28.2 or later; go.temporal.io/server to 1.29.2 or later; go.temporal.io/server to 1.29.0-135.0.0.20251218190115-b292a32bacdf or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2025-14987? CVE-2025-14987 is a medium-severity incorrect authorization vulnerability in go.temporal.io/server (go), affecting versions < 1.27.4. It is fixed in 1.27.4, 1.28.2, 1.29.2, 1.29.0-135.0.0.20251218190115-b292a32bacdf. The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions.
- Which versions of go.temporal.io/server are affected by CVE-2025-14987? go.temporal.io/server (go) versions < 1.27.4 is affected.
- Is there a fix for CVE-2025-14987? Yes. CVE-2025-14987 is fixed in 1.27.4, 1.28.2, 1.29.2, 1.29.0-135.0.0.20251218190115-b292a32bacdf. Upgrade to this version or later.
- Is CVE-2025-14987 exploitable, and should I be worried? Whether CVE-2025-14987 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-14987 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-14987?
- Upgrade
go.temporal.io/serverto 1.27.4 or later - Upgrade
go.temporal.io/serverto 1.28.2 or later - Upgrade
go.temporal.io/serverto 1.29.2 or later - Upgrade
go.temporal.io/serverto 1.29.0-135.0.0.20251218190115-b292a32bacdf or later
- Upgrade