CVE-2026-115635AshPostgres returns another tenant's record for a skipped upsert when return_skipped_upsert? is set
Beschreibung
Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to read another tenant's record through a skipped upsert. When Ash.bulk_create/4 or a single create runs as an upsert with return_skipped_upsert?: true and the upsert is skipped (for example because its upsert_condition does not hold), AshPostgres.DataLayer reads the existing row back by the upsert identity in do_bulk_create/3 and upsert/4. That lookup did not apply the resource's attribute multitenancy, so on a resource using strategy :attribute it could match and return the row of another tenant with the same identity values, exposing its fields to the caller. This issue affects ash_postgres: from 2.6.22 before 2.15.2.
Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.
Betroffene Produkte und Versionen
| Hersteller | Produkt | Versionen | |
|---|---|---|---|
| ash-project | ash_postgres | 2.6.22 – < 2.15.2 |
Referenzen und Patches
- `Ash.bulk_create` with `return_skipped_upsert?: true` in AshPostgres returns another tenant's record for a skipped upsert vendor-advisory
- EEF CNA record for CVE-2026-115635
- OSV record EEF-CVE-2026-115635
- Introducing commit af0903f in ash-project/ash_postgres
- Fix commit 8aa8122 in ash-project/ash_postgres patch