---
id: CVE-2026-81643
title: >-
  Incorrect Authorization vulnerability in ash-project ash_graphql delivers
  GraphQL subscription payloads for records a subscriber is not authorized to
  see.


  In AshGraphql.Subscription.Batcher, do_send/5 resolves the first notification
  of …
summary: >-
  Incorrect Authorization vulnerability in ash-project ash_graphql delivers
  GraphQL subscription payloads for records a subscriber is not authorized to
  see.


  In AshGraphql.Subscription.Batcher, do_send/5 resolves the first notification
  of …
severity: none
cwe:
  - CWE-863
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81643'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-81643.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/ash-project/ash_graphql/commit/e8e67f39add2ce0771e6db5f086afe68ba212c57
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/ash-project/ash_graphql/security/advisories/GHSA-j684-hch4-q888
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-81643'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
ingestedAt: '2026-08-31T02:00:58.405Z'
epss: 0.00427
epssPercentile: 0.34363
---

## Overview

Incorrect Authorization vulnerability in ash-project ash_graphql delivers GraphQL subscription payloads for records a subscriber is not authorized to see.

In AshGraphql.Subscription.Batcher, do_send/5 resolves the first notification of a batch and filters it with should_send?/1, which drops results whose errors are coded forbidden or not_found or carry no code, precisely so that unauthorized results are not disclosed. The remaining notifications in the batch are read from the process dictionary, re-run through the pipeline, and appended to the outgoing results without that filter. They reach pubsub.publish_subscription/2, and the not is_nil(record) guard drops only nil records, not error-carrying results. Any two qualifying notifications arriving within the default one-second batch interval suffice, and batching is the default path. The fix applies should_send?/1 to the whole batch.

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.