CVE-2026-82738
Description
Improper Input Validation vulnerability in ash-project ash allows an attacker to persistently deny reads of a record by storing a non-version-7 UUID in an Ash.Type.UUIDv7 attribute. Ash.Type.UUIDv7.cast_input/2 accepts any well-formed UUID string, including non-version-7 UUIDs, and stores it as a 16-byte binary. On read, cast_stored/2 (lib/ash/type/uuid_v7.ex) routes the stored binary back through cast_input/2, which since an input-validation tightening in v3.6.3 matches only version-7 (and optionally version-4) 16-byte binaries and otherwise expects a 36-character string. A stored non-v7 16-byte binary matches neither clause and returns :error, so every later read of that record fails. An attacker able to set such an attribute poisons the row permanently. The fix decodes any 16-byte stored binary directly in cast_stored/2. This issue affects ash: from 3.6.3 before 3.32.2.
How to fix
- ash-project ash3.32.2, c453cdc0b8570e86ffef0d10e136247f52b3ea76 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ash-project ash | 3.6.3 ≤ v < 3.32.2, 751d8a4d11564efbe358c90c8347f3a00eb60782 ≤ v < c453cdc0b8570e86ffef0d10e136247f52b3ea76 | 3.32.2, c453cdc0b8570e86ffef0d10e136247f52b3ea76 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.