{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115627",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-10-23T13:00:02.154Z",
        "datePublished": "2026-10-25T19:49:50.510Z",
        "dateUpdated": "2026-10-25T19:49:50.510Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_postgres:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshPostgres.DataLayer'"
                    ],
                    "packageName": "ash_postgres",
                    "packageURL": "pkg:hex/ash_postgres",
                    "product": "ash_postgres",
                    "programFiles": [
                        "lib/data_layer.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':lateral_join_query/3"
                        },
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':through_step_queries/4"
                        },
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':run_query_with_lateral_join/4"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_postgres",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "2.15.2",
                            "status": "affected",
                            "version": "0.38.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_postgres:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshPostgres.DataLayer'"
                    ],
                    "packageName": "ash-project/ash_postgres",
                    "packageURL": "pkg:github/ash-project/ash_postgres",
                    "product": "ash_postgres",
                    "programFiles": [
                        "lib/data_layer.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':lateral_join_query/3"
                        },
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':through_step_queries/4"
                        },
                        {
                            "name": "'Elixir.AshPostgres.DataLayer':run_query_with_lateral_join/4"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_postgres",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "8c25c945c39a45299193fe70b09fc2fa2aacac7b",
                            "status": "affected",
                            "version": "7115bec58678f13b1ac2fb4822a0ba1aea9dbec5",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Reachable when the join resource of a <code>many_to_many</code> relationship, or a resource along a <code>through</code> path, uses attribute multitenancy and holds rows from several tenants, and the relationship is loaded with a lateral join (for example with a limit, offset or sort on the relationship).</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "Reachable when the join resource of a `many_to_many` relationship, or a resource along a `through` path, uses attribute multitenancy and holds rows from several tenants, and the relationship is loaded with a lateral join (for example with a limit, offset or sort on the relationship)."
                        }
                    ],
                    "value": "Reachable when the join resource of a many_to_many relationship, or a resource along a through path, uses attribute multitenancy and holds rows from several tenants, and the relationship is loaded with a lateral join (for example with a limit, offset or sort on the relationship)."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ash-project:ash_postgres:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "2.15.2",
                                    "versionStartIncluding": "0.38.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Will Townsend"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Will Townsend"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Zach Daniel / Ash Project"
                }
            ],
            "dateAssigned": "2026-10-25T17:27:14.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.</p>\n<p>When a <code>many_to_many</code> relationship, or a <code>through</code> relationship, is loaded with a lateral join (for example with a per-record limit or sort), <code>AshPostgres.DataLayer</code> builds the query for the join resource, and for each resource along a <code>through</code> path, in <code>lateral_join_query/3</code> and <code>through_step_queries/4</code> without running that resource's read action, which is where attribute multitenancy is applied. When those resources use <code>strategy :attribute</code> multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.</p>\n<p>This issue affects ash_postgres: from 0.38.0 before 2.15.2.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.\n\nWhen a `many_to_many` relationship, or a `through` relationship, is loaded with a lateral join (for example with a per-record limit or sort), `AshPostgres.DataLayer` builds the query for the join resource, and for each resource along a `through` path, in `lateral_join_query/3` and `through_step_queries/4` without running that resource's read action, which is where attribute multitenancy is applied. When those resources use `strategy :attribute` multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.\n\nThis issue affects ash_postgres: from 0.38.0 before 2.15.2."
                        }
                    ],
                    "value": "Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.\n\nWhen a many_to_many relationship, or a through relationship, is loaded with a lateral join (for example with a per-record limit or sort), AshPostgres.DataLayer builds the query for the join resource, and for each resource along a through path, in lateral_join_query/3 and through_step_queries/4 without running that resource's read action, which is where attribute multitenancy is applied. When those resources use strategy :attribute multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.\n\nThis issue affects ash_postgres: from 0.38.0 before 2.15.2."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-1",
                    "descriptions": [
                        {
                            "lang": "en",
                            "supportingMedia": [
                                {
                                    "base64": false,
                                    "type": "text/html",
                                    "value": "<p>A user of one tenant loading a many_to_many or through relationship receives destination records linked only through another tenant's join rows.</p>"
                                },
                                {
                                    "base64": false,
                                    "type": "text/markdown",
                                    "value": "A user of one tenant loading a many_to_many or through relationship receives destination records linked only through another tenant's join rows."
                                }
                            ],
                            "value": "A user of one tenant loading a many_to_many or through relationship receives destination records linked only through another tenant's join rows."
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 6,
                        "baseSeverity": "MEDIUM",
                        "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: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": "2026-10-25T19:49:50.510Z"
            },
            "references": [
                {
                    "name": "AshPostgres ignores attribute multitenancy on the join resource when loading `many_to_many` and `through` relationships, returning records related through other tenants' rows",
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash/security/advisories/GHSA-gr2r-f49c-9gm2"
                },
                {
                    "name": "EEF CNA record for CVE-2026-115627",
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-115627.html"
                },
                {
                    "name": "OSV record EEF-CVE-2026-115627",
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-115627"
                },
                {
                    "name": "Introducing commit 7115bec in ash-project/ash_postgres",
                    "tags": [
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash_postgres/commit/7115bec58678f13b1ac2fb4822a0ba1aea9dbec5"
                },
                {
                    "name": "Fix commit 8c25c94 in ash-project/ash_postgres",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_postgres/commit/8c25c945c39a45299193fe70b09fc2fa2aacac7b"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "AshPostgres ignores attribute multitenancy on the join resource when loading many_to_many and through relationships, returning records related through other tenants' rows"
        }
    }
}