ash-project ash_admin 0.13.7/1.3.0 File Upload client_name path traversal

Summaryinfo

A vulnerability identified as critical has been detected in ash-project ash_admin 0.13.7/1.3.0. The impacted element is the function AshAdmin.Components.Resource.Form.consume_file_uploads of the component File Upload. The manipulation of the argument client_name leads to path traversal. This vulnerability is uniquely identified as CVE-2026-82673. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ash-project ash_admin 0.13.7/1.3.0. This issue affects the function AshAdmin.Components.Resource.Form.consume_file_uploads of the component File Upload. The manipulation of the argument client_name with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) vulnerability in ash-project ash_admin allows writing attacker-controlled bytes to arbitrary paths on the server. AshAdmin.Components.Resource.Form.consume_file_uploads/1 builds the destination as Path.join([tmp_dir, entry.client_name]) and writes it with File.cp!/2. entry.client_name is the browser-supplied filename and is not sanitized, and Path.join/1 does not normalize ... An upload named ../../../../var/www/app/priv/static/x.png therefore escapes the random temp directory and lands anywhere the BEAM user can write, enabling arbitrary file write and potentially remote code execution by overwriting application assets, configuration, or cron/ssh files. The only guard is an extension allowlist defaulting to :any that checks only the extension. The fix strips path components with Path.basename/1 before joining. This issue affects ash_admin: from 0.13.7 before 1.3.1.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-82673 since 08/31/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 1.3.1 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ash-project

Name

• ash_admin

Version

• 0.13.7
• 1.3.0

Website

• Product: https://github.com/ash-project/ash_admin/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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