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.
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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sun, 25 Oct 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Loading a through relationship with a limit of 1 in Ash ignores the through path and returns unrelated destination records | |
| First Time appeared |
Ash-project
Ash-project ash |
|
| Weaknesses | CWE-863 | |
| CPEs | cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Ash-project
Ash-project ash |
|
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: EEF
Published:
Updated: 2026-10-25T19:47:30.612Z
Reserved: 2026-10-25T14:30:01.870Z
Link: CVE-2026-114214
No data.
Status : Received
Published: 2026-10-25T20:16:31.920
Modified: 2026-10-25T20:16:31.920
Link: CVE-2026-114214
No data.
OpenCVE Enrichment
No data.
Weaknesses