CVE-2026-124033
Relative path traversal in the log export commands in AWS ParallelCluster CLI
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. The written files would have names and content controlled by a third party, and would be created with the privileges of the user running the command. To remediate this issue, users should upgrade to version 3.16.0 or later.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: AMZNAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| aws-parallelcluster AWS |
≥ 3.0.0; < 3.16.0 (affected, custom)
Other versions: unaffected |
CNA: AMZN |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.4 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H | CNA: AMZN |
| 4.0 / 5.9 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: AMZN |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/aws/aws-parallelcluster/releases/tag/v3.16.0CNA: AMZN · release-notes, patch
- https://aws.amazon.com/security/security-bulletins/2026-174-aws/CNA: AMZN · vendor-advisory
- https://github.com/aws/aws-parallelcluster/security/advisories/GHSA-h79v-mp93-644rCNA: AMZN · third-party-advisory
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