# CVE-2026-82673: ash-project ash_admin path traversal in file upload

Source: https://junglewise.ai/threats/cve-2026-82673-ash-project-ash-admin-path-traversal-in-file-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-31. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82673 · Severity: info · CVSS 8.2 · Published 2026-08-31

ash_admin is a web administration component used to manage Phoenix/Elixir applications. An attacker can upload files with specially crafted names (e.g., "../../../../var/www/app/config.txt") to bypass directory restrictions and write arbitrary files to the server, potentially leading to remote code execution by overwriting application files, configuration, or system scripts.

Technologies: [Ash-Project Ash Admin](https://junglewise.ai/threats/technologies/ash-admin). Vendors: [Ash-Project](https://junglewise.ai/threats/vendors/ash-project).

## Quick answers

**Is CVE-2026-82673 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82673 being exploited in the wild.

**How severe is CVE-2026-82673?** Informational severity, with a CVSS score of 8.2, published 31 August 2026.

**Which products and versions are affected?** Ash-Project Ash Admin 0.13.7 before 1.3.1.

**Is there a fix for CVE-2026-82673?** A patch was published on 2026-08-31: fix available in 1.3.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-82673 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-82673?** Check whether you run Ash-Project Ash Admin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a path traversal (CWE-22) in the file upload handler. The vulnerable code in AshAdmin.Components.Resource.Form.consume_file_uploads/1 uses Path.join([tmp_dir, entry.client_name]) to build the destination path without sanitizing the user-supplied filename (entry.client_name). The Path.join/1 function does not normalize path traversal sequences like "..", allowing an attacker to escape the temporary directory. An upload named "../../../../var/www/app/priv/static/x.png" can land in arbitrary writable locations. The only existing guard is an extension allowlist that checks only the file extension, which is insufficient. The fix applies Path.basename/1 to strip path components before joining.

## Affected products

- ash-project ash_admin 0.13.7 before 1.3.1

## Timeline

- 2026-08-31: disclosed
- 2026-08-31: patched: fix available in 1.3.1

## References

- [https://repo.hex.pm/](https://repo.hex.pm/)
- [https://github.com/](https://github.com/)

## Related threats

- [ash-project ash_admin resource exhaustion in LiveView handlers](https://junglewise.ai/threats/cve-2026-82722-ash-project-ash-admin-resource-exhaustion-in-liveview-handlers)
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- [ash-project ash_admin authorization bypass via user-controlled key](https://junglewise.ai/threats/cve-2026-81853-ash-project-ash-admin-authorization-bypass-via-user-controlled)
- [ash-project ash_admin hardcoded CSP nonce bypass](https://junglewise.ai/threats/cve-2026-81852-ash-project-ash-admin-hardcoded-csp-nonce-bypass)
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