EEF-CVE-2026-80223

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Source
https://cna.erlef.org/osv/EEF-CVE-2026-80223.html
Import Source
https://cna.erlef.org/osv/EEF-CVE-2026-80223.json
JSON Data
https://api.osv.dev/v1/vulns/EEF-CVE-2026-80223
Aliases
Published
2026-08-30T18:27:09Z
Modified
2026-09-08T20:30:03Z
Severity
  • 7.1 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read
Details

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 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.

Configurations

The application exposes ash_graphql subscriptions on a multitenant resource whose read policy passes on in-memory filter evaluation alone, and where a notification created in one tenant can reach a subscriber scoped to another tenant.

Database specific 
{
    "capec_ids": [
        "CAPEC-1"
    ],
    "cpe_ids": [
        "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"
    ],
    "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-2026-80223.json"

Git / github.com/ash-project/ash_graphql

Affected ranges

Type
GIT
Repo
https://github.com/ash-project/ash_graphql
Events
Introduced
4c377e541a2adb6befc651f3dccc6a797bc58ba9
Fixed
6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e

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-2026-80223.json"