Ash-Project Ash up to 3.37.1 Create create.ex Ash.Actions.Create authorization

Summaryinfo

A vulnerability, which was classified as critical, was found in Ash-Project Ash up to 3.37.1. This vulnerability affects the function Ash.Actions.Create of the file lib/ash/actions/create/create.ex of the component Create. The manipulation results in authorization. This vulnerability is known as CVE-2026-96581. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Ash-Project Ash up to 3.37.1. Affected is the function Ash.Actions.Create of the file lib/ash/actions/create/create.ex of the component Create. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Authorization Bypass Through User-Controlled Key vulnerability in ash-project ash allows a user of one tenant to read, overwrite and take over another tenant's records via an upserting create action. Under attribute multitenancy, Ash.Actions.Create (lib/ash/actions/create/create.ex) and Ash.Actions.Create.Bulk (lib/ash/actions/create/bulk.ex) upserted on the primary key, or on an all_tenants? identity, without scoping the conflicting record to the request's tenant. A caller of a create action with upsert? true that accepts the primary key, supplying a record id from another tenant, updated that record's upsert fields and received all of its attributes in the result. With the default upsert fields the tenant attribute was written too, moving the record into the caller's tenant. Read and update policies do not run for upserts, and tenant-scoped create policies pass because the tenant is the caller's own. This issue affects ash: from 1.22.0 before 3.37.2.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-96581 since 10/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit.

Upgrading to version 3.37.2 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• Ash-Project

Name

• Ash

Version

• 3.37.0
• 3.37.1

Website

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

CPE 2.3info

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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