CVE-2026-42295

### Summary The workflow executor logs all artifact repository credentials (S3 access keys, secret keys, GCS service account keys, Azure account keys, Git passwords, etc.) in plaintext on artifact operation. Any user with read access to workflow pod logs can extract these credentials. **Note:** This is an incomplete fix of [CVE-2025-62157](https://github.com/argoproj/argo-workflows/security/advisories/GHSA-c2hv-4pfj-mm2r) ### Details The logging driver passes the entire ArtifactDriver struct to the structured logger, for example: https://github.com/argoproj/argo-workflows/blob/59f1089b9875723ddffd524513e6bd5cb37e5e31/workflow/artifacts/logging/driver.go#L24 Exposed credential fields: - S3 (workflow/artifacts/s3/s3.go): AccessKey, SecretKey, SessionToken, ServerSideCustomerKey - OSS (workflow/artifacts/oss/oss.go): AccessKey, SecretKey, SecurityToken - GCS (workflow/artifacts/gcs/gcs.go): ServiceAccountKey ### PoC 1. Create template ```yml apiVersion: argoproj.io/v1alpha1 kind: Workflow metadata: name: cred-leak-test namespace: argo spec: entrypoint: main templates: - name: main container: image: alpine:3.13 command: [sh, -c] args: ["echo 'hello' > /tmp/output.txt"] outputs: artifacts: - name: output path: /tmp/output.txt s3: endpoint: minio:9000 insecure: true bucket: my-bucket key: test-output.txt accessKeySecret: name: my-minio-cred key: accesskey secretKeySecret: name: my-minio-cred key: secretkey ``` 2. Then check the logs `kubectl -n argo logs "cred-leak-test" -c wait` <img width="1248" height="322" alt="image" src="https://github.com/user-attachments/assets/a5cf6d66-7d67-408d-8583-27d11ecf1507" /> ### Impact Any user with Kubernetes RBAC permissions to read pod logs in the workflow namespace can extract artifact repository credentials.

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the workflow executor logs all artifact repository credentials (S3 access keys, secret keys, GCS service account keys, Azure account keys, Git passwords, etc.) in plaintext on artifact operation. Any user with read access to workflow pod logs can extract these credentials. This issue has been patched in version 4.0.5.

Argo vulnerable to exposure of artifact repository credentials in github.com/argoproj/argo-workflows