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+# Github Workflows Security Notice
+
+Writing security workflows that can be accessed by third parties outside of your repository is inherently dangerous. There is a full list of vulnerabilities that you can subject yourself to when you enable external users to interact with your workflows. These vulnerabilities are well-described here: https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions as well as detail on how to mitigate these risks.
+
+As a rule-of-thumb within the Karpenter workflows, we have chosen to always assign any input that _might_ come from a user in either a Github workflow or a composite action into environment variables any we are using a bash or javascript script as a step in the workflow or action. An example of this can be seen below:
+
+```yaml
+- name: Save info about the review comment as an artifact for other workflows that run on workflow_run to download them
+  env:
+    # We store these values in environment variables to avoid bash script injection
+    # Specifically, it's important that we do this for github.event.review.body since this is user-controller input
+    # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions
+    REVIEW_BODY: ${{ github.event.review.body }}
+    PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number }}
+    COMMIT_ID: ${{ github.event.review.commit_id }}
+  run: |
+    mkdir -p /tmp/artifacts
+    { echo "$REVIEW_BODY"; echo "$PULL_REQUEST_NUMBER"; echo "$COMMIT_ID"; } >> /tmp/artifacts/metadata.txt
+    cat /tmp/artifacts/metadata.txt
+```
+
+Note that, when you are writing Github workflows or composite actions to ensure to follow this code-style to reduce the attack surface could result from attempted script injection to the workflows.
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