CVE-2026-115627 Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only t
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-115627?
CVE-2026-115627 is a medium-severity vulnerability in ash-project ash_postgres, published on 25 Oct 2026.
Official description
Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.
When a many_to_many relationship, or a through relationship, is loaded with a lateral join (for example with a per-record limit or sort), AshPostgres.DataLayer builds the query for the join resource, and for each resource along a through path, in lateral_join_query/3 and through_step_queries/4 without running that resource's read action, which is where attribute multitenancy is applied. When those resources use strategy :attribute multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.
This issue affects ash_postgres: from 0.38.0 before 2.15.2.
Weakness: CWE-863
Which versions are affected by CVE-2026-115627?
1 open source package ship an affected version, including ash_postgres.
| Package | Affected | Fixed in |
|---|---|---|
ash_postgres Hex | From 0.38.0 | 2.15.2 |
How do I fix CVE-2026-115627?
Upgrade ash_postgres to 2.15.2 or later.
Is CVE-2026-115627 being exploited?
There is no known exploitation of CVE-2026-115627 in the wild and no public exploit code.
Sources
Also known as EEF-CVE-2026-115627, GHSA-gr2r-f49c-9gm2.