Vulnerability Description
Improper Input Validation vulnerability in ash-project ash fails to enforce the outer array constraints on a doubly-nested {:array, {:array, type}} attribute, letting invalid input pass validation. Ash.Type.apply_constraints/3 (lib/ash/type/type.ex) handled the {:array, {:array, type}} case by mapping only the inner {:array, type} constraints over each element, so constraints declared on the outer array (such as min_length, max_length, and nil_items?) were never applied. An attacker could submit an outer list that violates those constraints (too many elements, or nil entries where disallowed) and have it accepted and persisted. The fix enforces the outer array constraints and adds explicit handling for nil and non-list inputs. This issue affects ash: from 2.16.1 before 3.32.2.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-82740.html
- https://github.com/ash-project/ash/commit/c85ccff7dc6e3b0b3e40ad788b0056b3b6bee5
- https://github.com/ash-project/ash/security/advisories/GHSA-v29m-p28g-w5fc
- https://osv.dev/vulnerability/EEF-CVE-2026-82740
- https://github.com/ash-project/ash/security/advisories/GHSA-v29m-p28g-w5fc
FAQ
What is CVE-2026-82740?
CVE-2026-82740 is a documented vulnerability. Improper Input Validation vulnerability in ash-project ash fails to enforce the outer array constraints on a doubly-nested {:array, {:array, type}} attribute, letting invalid input pass validation. A...
How severe is CVE-2026-82740?
CVSS scoring is not yet available for CVE-2026-82740. Check NVD for updates.
Is there a patch for CVE-2026-82740?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.