Ash-Project Ash up to 3.34.6 Relationships relationships.ex lateral_join? improper authorization

Summaryinfo

A vulnerability marked as problematic has been reported in Ash-Project Ash. The affected element is the function lateral_join? of the file lib/ash/actions/read/relationships.ex of the component Relationships. The manipulation leads to improper authorization. This vulnerability is documented as CVE-2026-114214. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Ash-Project Ash. It has been rated as problematic. This issue affects the function lateral_join? of the file lib/ash/actions/read/relationships.ex of the component Relationships. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

Incorrect Authorization vulnerability in ash-project ash allows a client to read destination records unrelated to the source record through a through relationship. When a has_many relationship declared with through: was loaded for a single record with a limit of 1, or an unsorted has_one through relationship was loaded with a limit of 1, lateral_join?/4 in lib/ash/actions/read/relationships.ex chose the path that reads the destination without any filter linking it to the source. The load returned the first destination record by sort, or any other record with an offset. The read still runs the destination's policies but carries the relationship as accessing_from, so a client paging such a field (for example teachers(limit: 1, offset: n) through AshGraphql) can enumerate destination records that policies allow only when reached through that relationship. This issue affects ash: from 3.24.0 before 3.37.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-114214 since 10/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 3.37.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-109567). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Project Management Software

Vendor

• Ash-Project

Name

• Ash

Version

• 2.19.0
• 3.0.0-rc.17
• 3.22.0
• 3.29.3
• 3.31.1
• 3.31.3
• 3.32.1
• 3.32.2
• 3.33.0
• 3.33.4
• 3.33.11
• 3.34.3
• 3.34.6

Website

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

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