oscal-compass Compliance-trestle up to 3.12.3/4.0.0-4.0.3 Author Commands is_directory_name_allowed output path traversal

Summaryinfo

A vulnerability classified as problematic has been found in oscal-compass Compliance-trestle up to 3.12.3/4.0.0-4.0.3. Affected by this vulnerability is the function is_directory_name_allowed of the component Author Commands. This manipulation of the argument output causes path traversal. This vulnerability is tracked as CVE-2026-57171. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability has been found in oscal-compass Compliance-trestle up to 3.12.3/4.0.0-4.0.3 and classified as problematic. Affected by this vulnerability is the function is_directory_name_allowed of the component Author Commands. The manipulation of the argument output with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. The summary by CVE is:

Compliance-trestle (Trestle) is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions before 3.12.4 and versions 4.0.0 through 4.0.3, the catalog-generate, profile-generate, and ssp-generate author commands write generated Markdown to an attacker-influenced output path without path-traversal validation, allowing arbitrary file write outside the Trestle workspace. These commands join the user-supplied output argument onto the Trestle root and write to the result, but guard it only with an is_directory_name_allowed() task-name-collision check rather than the PathSecurityValidator.validate_local_path() guard used by the jinja command, so an absolute path or one containing traversal sequences escapes the workspace and writes files under an attacker-chosen location as the invoking process owner. The security boundary is crossed when a trusted CI job, shared service, or wrapper derives the output argument from repository-controlled, tenant-controlled, or otherwise untrusted data while expecting output to stay inside the workspace. When --force-overwrite is used, the selected output directory is first recursively deleted, extending the primitive to destruction of an attacker-chosen directory tree and enabling indirect code execution by overwriting files a pipeline later runs. This issue is fixed in versions 3.12.4 and 4.1.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-57171 since 06/24/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 3.12.4 or 4.1.0 eliminates this vulnerability.

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Productinfo

Vendor

• oscal-compass

Name

• Compliance-trestle

Version

• 3.12.0
• 3.12.1
• 3.12.2
• 3.12.3
• 4.0.0-4.0.0
• 4.0.0-4.0.1
• 4.0.0-4.0.2
• 4.0.0-4.0.3

Website

• Product: https://github.com/oscal-compass/compliance-trestle/

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