CVE-2026-4064
Received Received - Intake
Authorization Bypass in PowerShell Universal gRPC Services Enables Privilege Escalation

Publication date: 2026-03-17

Last updated on: 2026-03-19

Assigner: Devolutions Inc.

Description
Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.
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Meta Information
Published
2026-03-17
Last Modified
2026-03-19
Generated
2026-06-16
AI Q&A
2026-03-17
EPSS Evaluated
2026-06-14
NVD
CVE-2026-4064
EUVD
EUVD-2026-12637
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
ironmansoftware powershell_universal to 2026.1.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability involves missing authorization checks on multiple gRPC service endpoints in PowerShell Universal versions before 2026.1.4. It allows any authenticated user with a valid token to bypass role-based access controls.

As a result, the user can perform privileged operations such as reading sensitive data, creating or deleting resources, and disrupting service operations by sending specially crafted gRPC requests.

Impact Analysis

The impact of this vulnerability includes unauthorized access to sensitive data, unauthorized creation or deletion of resources, and potential disruption of service operations.

Because role-based access controls can be bypassed, users who should not have privileged access may gain it, leading to potential data breaches, loss of data integrity, and service downtime.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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