{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-81643",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-08-30T04:45:01.564Z",
        "datePublished": "2026-08-30T18:20:35.564Z",
        "dateUpdated": "2026-08-30T18:20:35.564Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshGraphql.Subscription.Batcher'"
                    ],
                    "packageName": "ash_graphql",
                    "packageURL": "pkg:hex/ash_graphql",
                    "product": "ash_graphql",
                    "programFiles": [
                        "lib/subscription/batcher.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshGraphql.Subscription.Batcher':do_send/5"
                        }
                    ],
                    "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.Subscription.Batcher'"
                    ],
                    "packageName": "ash-project/ash_graphql",
                    "packageURL": "pkg:github/ash-project/ash_graphql",
                    "product": "ash_graphql",
                    "programFiles": [
                        "lib/subscription/batcher.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshGraphql.Subscription.Batcher':do_send/5"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_graphql",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "e8e67f39add2ce0771e6db5f086afe68ba212c57",
                            "status": "affected",
                            "version": "3cb2c9870d050c7c4bba6c211aaed97d732f7e81",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application exposes <code>ash_graphql</code> subscriptions with Ash authorization enabled, and two or more notifications are batched together within the batch interval (the default path).</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "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)."
                        }
                    ],
                    "value": "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)."
                }
            ],
            "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 delivers GraphQL subscription payloads for records a subscriber is not authorized to see.</p>\n<p>In <code>AshGraphql.Subscription.Batcher</code>, <code>do_send/5</code> resolves the first notification of a batch and filters it with <code>should_send?/1</code>, which drops results whose errors are coded <code>forbidden</code> or <code>not_found</code> 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 <code>pubsub.publish_subscription/2</code>, and the <code>not is_nil(record)</code> 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 <code>should_send?/1</code> to the whole batch.</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 delivers GraphQL subscription payloads for records a subscriber is not authorized to see.\n\nIn `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.\n\nThis issue affects ash_graphql: from 1.4.0 before 1.11.0."
                        }
                    ],
                    "value": "Incorrect Authorization vulnerability in ash-project ash_graphql delivers GraphQL subscription payloads for records a subscriber is not authorized to see.\n\nIn 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.\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": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 2.3,
                        "baseSeverity": "LOW",
                        "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:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "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": "2026-08-30T18:20:35.564Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-j684-hch4-q888"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-81643.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-81643"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_graphql/commit/e8e67f39add2ce0771e6db5f086afe68ba212c57"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "Broken access control in AshGraphql subscription batcher applies authorization suppression to only the first notification"
        }
    }
}