ash-project ash up to 3.32.1 Decimal lib/ash/type/decimal.ex cast_input/2 input validation

Summaryinfo

A vulnerability classified as critical was found in ash-project ash up to 3.32.1. This impacts the function cast_input/2 of the file lib/ash/type/decimal.ex of the component Decimal. Executing a manipulation can lead to input validation. This vulnerability is handled as CVE-2026-82734. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in ash-project ash up to 3.32.1 and classified as critical. This vulnerability affects the function cast_input/2 of the file lib/ash/type/decimal.ex of the component Decimal. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to submit a non-finite decimal value that bypasses numeric bounds constraints or fails later operations on the value. Ash.Type.Decimal cast input through Ecto's decimal cast in cast_input/2 and cast_stored/2 (lib/ash/type/decimal.ex) without checking that the resulting value is finite. Elixir's Decimal represents Infinity and NaN as valid structs, so a value such as "Infinity" or "NaN" passed casting and was persisted. Because NaN compares as false against every bound, min and max constraints do not reject it, and the stored special value later raises when used in Decimal arithmetic or is refused by the data layer, failing subsequent requests. The fix rejects any non-finite Decimal during casting. This issue affects ash: from 1.28.0 before 3.32.2.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-82734 since 08/31/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, 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/

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CPE 2.2info

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