Relative path traversal in the log export commands in AWS ParallelCluster CLI

Bulletin ID: 2026-174-AWS Publication Date: 11/09/2026 13:00 PM PST Description: AWS ParallelCluster CLI is an open source command line tool, distributed on PyPI as aws-parallelcluster. We identified CVE-2026-124033, an issue where the export-cluster-logs and export-image-logs commands in the AWS ParallelCluster CLI before version 3.16.0 contain a relative path traversal issue. An authenticated remote user with write access to the log export Amazon S3 bucket could use a crafted S3 object key to write files outside the intended export directory on the machine running the command. Impacted versions: >= 3.0.0 AND < 3.16.0 Refer to the article for the most up-to-date and complete information. Read this article