CVE-2022-39327: Improper Control of Generation of Code ('Code Injection') in Azure CLI

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-10-25 · updated 2026-06-17
Weakness: CWE-94

Description

Azure CLI is the command-line interface for Microsoft Azure. In versions previous to 2.40.0, Azure CLI contains a vulnerability for potential code injection. Critical scenarios are where a hosting machine runs an Azure CLI command where parameter values have been provided by an external source. The vulnerability is only applicable when the Azure CLI command is run on a Windows machine and with any version of PowerShell and when the parameter value contains the `&` or `|` symbols. If any of these prerequisites are not met, this vulnerability is not applicable. Users should upgrade to version 2.40.0 or greater to receive a a mitigation for the vulnerability.

Affected products

Microsoft Azure CLI: before 2.40.0 — fixed in 2.40.0
Microsoft Azure CLI: before 2.40.0

How to fix

Upgrade to a fixed version: Microsoft Azure CLI 2.40.0. Check the vendor advisory for mitigations.

References

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