---
id: CVE-2026-80223
title: >-
  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 a…
summary: >-
  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 a…
severity: none
cwe:
  - CWE-863
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80223'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-80223.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-80223'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
ingestedAt: '2026-08-31T02:00:58.101Z'
epss: 0.00427
epssPercentile: 0.34269
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.