# CVE-2026-115627: ash-project ash_postgres incorrect authorization in many-to-many relationships

Source: https://junglewise.ai/threats/cve-2026-115627-incorrect-authorization-vulnerability-in-ash-project-ash  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-25. Updated: 2026-10-25  
License: CC BY 4.0 with a link back

CVE-2026-115627 · Severity: info · Published 2026-10-25

ash_postgres is a database layer for the Ash framework that manages data access and relationships. When loading related records through many-to-many or join relationships with per-record limits or sorting, the library bypasses tenant authorization checks, allowing users to see records from other tenants they should not have access to.

Technologies: [Ash-Project Ash Postgres](https://junglewise.ai/threats/technologies/ash-postgres). Vendors: [Ash-Project](https://junglewise.ai/threats/vendors/ash-project).

## Quick answers

**Is CVE-2026-115627 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-115627 being exploited in the wild.

**How severe is CVE-2026-115627?** Informational severity, published 25 October 2026.

**Which products and versions are affected?** Ash-Project Ash Postgres 0.38.0 to before 2.15.2.

**Is there a fix for CVE-2026-115627?** Yes: fixed in ash_postgres 2.15.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-115627 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-115627?** Check whether you run Ash-Project Ash Postgres at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in ash_postgres 2.15.2

## Technical details

An incorrect authorization flaw in ash_postgres's lateral join handling (lateral_join_query/3 and through_step_queries/4) skips attribute-based multitenancy checks on intermediate resources in join paths. When relationships are loaded with lateral joins (per-record limit or sort), rows from other tenants are incorrectly joined, exposing destination records to unauthorized callers.

## Affected products

- ash-project ash_postgres 0.38.0 to before 2.15.2

## Timeline

- 2026-10-25: disclosed

## References

- [https://repo.hex.pm/](https://repo.hex.pm/)
- [https://github.com/](https://github.com/)

## Related threats

- [ash-project ash_postgres incorrect authorization in upsert](https://junglewise.ai/threats/cve-2026-115635-incorrect-authorization-vulnerability-in-ash-project-ash)
- [ash-project ash_postgres tenant rename data exposure](https://junglewise.ai/threats/cve-2026-78699-ash-project-ash-postgres-tenant-rename-data-exposure)