CVE-2026-80223 (GCVE-0-2026-80223)
Vulnerability from cvelistv5 – Published: 2026-08-30 18:27 – Updated: 2026-08-31 15:58
VLAI
EPSS
VEX
Title
Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 15:57 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash_graphql/securi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-80223.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-80223 | related |
| https://github.com/ash-project/ash_graphql/commit… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash_graphql |
Affected:
1.4.0 , < 1.11.0
(semver)
cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* |
||
| ash-project | ash_graphql |
Affected:
4c377e541a2adb6befc651f3dccc6a797bc58ba9 , < 6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e
(git)
cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* |
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A tenant-scoped read is reached only when filter evaluation fails.\\n\\nThis issue affects ash_graphql: from 1.4.0 before 1.11.0.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIncorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant\u0027s records over GraphQL subscriptions.\u003c/p\u003e\\n\u003cp\u003eThe subscription resolver in \u003ccode\u003eAshGraphql.Graphql.Resolver\u003c/code\u003e authorizes each notification payload in memory: its fast path calls \u003ccode\u003eAsh.can/3\u003c/code\u003e with \u003ccode\u003erun_queries?: false\u003c/code\u003e, which evaluates the read policy filter against the in-memory record via \u003ccode\u003eAsh.Expr.eval/2\u003c/code\u003e and never issues a query. Ash applies multitenancy at query-build and data-layer-prefix time, not inside \u003ccode\u003equery.filter\u003c/code\u003e, 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.\u003c/p\u003e\\n\u003cp\u003eThis issue affects ash_graphql: from 1.4.0 before 1.11.0.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant\u0027s records over GraphQL subscriptions.\\n\\nThe 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.\\n\\nThis issue affects ash_graphql: from 1.4.0 before 1.11.0.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe application exposes \u003ccode\u003eash_graphql\u003c/code\u003e 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.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"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.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.11.0\", \"versionStartIncluding\": \"1.4.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-08-30T18:27:09.440Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-80223\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-31T15:57:36.488596Z\"}}}], \"references\": [{\"url\": \"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-08-31T15:57:52.879Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-80223\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-30T18:27:09.440Z\", \"dateReserved\": \"2026-08-30T15:30:02.097Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-08-30T18:27:09.440Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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