Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-82673.html
- https://github.com/ash-project/ash_admin/commit/4bb41cb697f3d9be58462d727aed75ab
- https://github.com/ash-project/ash_admin/security/advisories/GHSA-483p-rgcq-p5j9
- https://osv.dev/vulnerability/EEF-CVE-2026-82673
- https://github.com/ash-project/ash_admin/security/advisories/GHSA-483p-rgcq-p5j9
FAQ
What is CVE-2026-82673?
CVE-2026-82673 is a documented vulnerability. 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...
How severe is CVE-2026-82673?
CVSS scoring is not yet available for CVE-2026-82673. Check NVD for updates.
Is there a patch for CVE-2026-82673?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.