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.
Metrics
CVSS 4.0 1.3/10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:X/RE:L/U:GreenWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Temporal | Temporal | >= 1.24.0, <= 1.29.1; >= 1.24.0, <= 1.28.1; >= 1.24.0, <= 1.27.3 |
References
Timeline
- Published
- Dec 30, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Deferred