EEF-CVE-2026-81643

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Source
https://cna.erlef.org/osv/EEF-CVE-2026-81643.html
Import Source
https://cna.erlef.org/osv/EEF-CVE-2026-81643.json
JSON Data
https://api.osv.dev/v1/vulns/EEF-CVE-2026-81643
Aliases
Published
2026-08-30T18:20:35.564Z
Modified
2026-08-30T18:25:38.177775772Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Broken access control in AshGraphql subscription batcher applies authorization suppression to only the first notification
Details

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 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.

Configuration

The application exposes ash_graphql subscriptions with Ash authorization enabled, and two or more notifications are batched together within the batch interval (the default path).

Database specific 
{
    "cpe_ids": [
        "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"
    ],
    "capec_ids": [
        "CAPEC-1"
    ],
    "cwe_ids": [
        "CWE-863"
    ]
}
References
Credits
    • Peter Ullrich - FINDER
    • Peter Ullrich - REPORTER
    • Zach Daniel / Ash Project - REMEDIATION_DEVELOPER
    • Jonatan Männchen / EEF - COORDINATOR

Affected packages

Hex / ash_graphql

Package

Name
ash_graphql
Purl
pkg:hex/ash_graphql

Affected ranges

Type
SEMVER
Events
Introduced
1.4.0
Fixed
1.11.0

Affected versions

1.*
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.5.0
1.5.1
1.6.0
1.7.0
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.7.6
1.7.7
1.7.8
1.7.9
1.7.10
1.7.11
1.7.12
1.7.13
1.7.14
1.7.15
1.7.16
1.7.17
1.8.0
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.9.0
1.9.1
1.9.2
1.9.3
1.9.4
1.10.0
1.10.1

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-81643.json"

Git / github.com/ash-project/ash_graphql

Affected ranges

Type
GIT
Repo
https://github.com/ash-project/ash_graphql
Events
Introduced
3cb2c9870d050c7c4bba6c211aaed97d732f7e81
Fixed
e8e67f39add2ce0771e6db5f086afe68ba212c57

Affected versions

v1.*
v1.10.0
v1.10.1
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.6
v1.4.7
v1.5.0
v1.5.1
v1.6.0
v1.7.0
v1.7.1
v1.7.10
v1.7.11
v1.7.12
v1.7.13
v1.7.14
v1.7.15
v1.7.16
v1.7.17
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-81643.json"