---
cve: "CVE-2026-80223"
severity: "HIGH"
cvss: 7.1
epss: "19.3%"
vendor: "ash-project"
kev: false
exploited: false
published: "2026-08-30 19:17:29"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T03:05:56+02:00"
---

# CVE-2026-80223

> 7.1 HIGH · 🧪 PoC

## Beschreibung

Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant's records over GraphQL subscriptions.

The subscription resolver in AshGraphql.Graphql.Resolver authorizes each notification payload in memory: its fast path calls Ash.can/3 with run_queries?: false, which evaluates the read policy filter against the in-memory record via Ash.Expr.eval/2 and never issues a query. Ash applies multitenancy at query-build and data-layer-prefix time, not inside query.filter, so the evaluated policy carries no tenant condition and a tenant-B notification routed to a tenant-A subscriber is emitted whenever the policy filter is true. The single-notification clause has no tenant guard at all, and the batched clause checks only the head of the notification list, so non-head entries authorize purely in memory. A tenant-scoped read is reached only when filter evaluation fails.

This issue affects ash_graphql: from 1.4.0 before 1.11.0.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 4e2c5476ecfd2c701488627ee46e6eefc58c982e (Commit)
- 6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e (Commit)

## Referenzen

- <https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2>
- <https://cna.erlef.org/cves/CVE-2026-80223.html>
- <https://osv.dev/vulnerability/EEF-CVE-2026-80223>
- <https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80223) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_