> 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/third-party-services/appsec-cicd-196.md).

# Mutable orb used in the pipeline

## Rule Details

|                       |                   |
| --------------------- | ----------------- |
| Cortex AppSec Rule ID | APPSEC\_CICD\_196 |
| Category              | Supply Chain      |
| Severity              | MEDIUM            |

## Impact

Volatile or development orbs are mutable, as they can be overwritten with new versions. Malicious actors who gain control of the registry will be able to push a malicious orb with an existing version. The orb will be pulled automatically by the pipeline, leading to code execution in the pipeline.

## Recommended Solution - Buildtime

It is recommended to use immutable production orbs which follow **semver** (semantic versioning) \[Major].\[Minor].\[Patch], as they cannot be deleted or edited.

For additional information, refer to: <https://circleci.com/docs/orb-concepts/#semantic-versioning>.


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