ash-project ash up to 3.32.1 UUIDv7 Type lib/ash/type/uuid_v7.ex cast_input input validation

Summaryinfo

A vulnerability was found in ash-project ash up to 3.32.1. It has been classified as problematic. This vulnerability affects the function cast_input of the file lib/ash/type/uuid_v7.ex of the component UUIDv7 Type. Performing a manipulation results in input validation. This vulnerability is identified as CVE-2026-82738. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in ash-project ash up to 3.32.1. This affects the function cast_input of the file lib/ash/type/uuid_v7.ex of the component UUIDv7 Type. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-82738 since 08/31/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available.

Upgrading to version 3.32.2 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ash-project

Name

• ash

Version

• 3.32.0
• 3.32.1

Website

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

CPE 2.3info

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CPE 2.2info

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

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