What’s Vulnerable › Vulnerabilities

CVE-2025-14986: ExecuteMultiOperation Namespace Policy Bypass

• Severity: low (CVSS 1.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-30 · updated 2026-06-17
• Weakness: CWE-863

Description

When frontend.enableExecuteMultiOperation is enabled, the server can apply namespace-scoped validation and feature gates for the embedded StartWorkflowExecutionRequest using its Namespace field rather than the outer, authorized ExecuteMultiOperationRequest.Namespace. This allows a caller authorized for one namespace to bypass that namespace's limits/policies by setting the embedded start request's namespace to a different namespace. The workflow is still created in the outer (authorized) namespace; only validation/gating is performed under the wrong namespace context. This issue affects Temporal: from 1.24.0 through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.

Affected products

• Temporal Technologies, Inc. Temporal Server: from 1.24.0 through 1.29.1; from 1.24.0 through 1.28.1; from 1.24.0 through 1.27.3

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

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