{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80223",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-08-30T15:30:02.097Z",
        "datePublished": "2026-08-30T18:27:09.440Z",
        "dateUpdated": "2026-08-30T18:27:09.440Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshGraphql.Graphql.Resolver'"
                    ],
                    "packageName": "ash_graphql",
                    "packageURL": "pkg:hex/ash_graphql",
                    "product": "ash_graphql",
                    "programFiles": [
                        "lib/graphql/resolver.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshGraphql.Graphql.Resolver':resolve/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_graphql",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "1.11.0",
                            "status": "affected",
                            "version": "1.4.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshGraphql.Graphql.Resolver'"
                    ],
                    "packageName": "ash-project/ash_graphql",
                    "packageURL": "pkg:github/ash-project/ash_graphql",
                    "product": "ash_graphql",
                    "programFiles": [
                        "lib/graphql/resolver.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshGraphql.Graphql.Resolver':resolve/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_graphql",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e",
                            "status": "affected",
                            "version": "4c377e541a2adb6befc651f3dccc6a797bc58ba9",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application exposes <code>ash_graphql</code> 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.</p>"
                        },
                        {
                            "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."
                        }
                    ],
                    "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."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.11.0",
                                    "versionStartIncluding": "1.4.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Zach Daniel / Ash Project"
                },
                {
                    "lang": "en",
                    "type": "coordinator",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant's records over GraphQL subscriptions.</p>\n<p>The subscription resolver in <code>AshGraphql.Graphql.Resolver</code> authorizes each notification payload in memory: its fast path calls <code>Ash.can/3</code> with <code>run_queries?: false</code>, which evaluates the read policy filter against the in-memory record via <code>Ash.Expr.eval/2</code> and never issues a query. Ash applies multitenancy at query-build and data-layer-prefix time, not inside <code>query.filter</code>, 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.</p>\n<p>This issue affects ash_graphql: from 1.4.0 before 1.11.0.</p>"
                        },
                        {
                            "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's 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."
                        }
                    ],
                    "value": "Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant's 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."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-1",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "privilegesRequired": "LOW",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "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",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "description": "CWE-863 Incorrect Authorization",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-08-30T18:27:09.440Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-80223.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-80223"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read"
        }
    }
}