{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-82730",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-08-31T00:59:08.960Z",
        "datePublished": "2026-09-01T02:09:01.851Z",
        "dateUpdated": "2026-09-01T02:09:01.851Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshTypescript.Rpc.ResultProcessor'"
                    ],
                    "packageName": "ash_typescript",
                    "packageURL": "pkg:hex/ash_typescript",
                    "product": "ash_typescript",
                    "programFiles": [
                        "lib/ash_typescript/rpc/result_processor.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_primitive/1"
                        },
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_value_for_json/1"
                        },
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_resource_struct/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_typescript",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "0.18.0",
                            "status": "affected",
                            "version": "0.11.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshTypescript.Rpc.ResultProcessor'"
                    ],
                    "packageName": "ash-project/ash_typescript",
                    "packageURL": "pkg:github/ash-project/ash_typescript",
                    "product": "ash_typescript",
                    "programFiles": [
                        "lib/ash_typescript/rpc/result_processor.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_primitive/1"
                        },
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_value_for_json/1"
                        },
                        {
                            "name": "'Elixir.AshTypescript.Rpc.ResultProcessor':normalize_resource_struct/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_typescript",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "aa7f9f1967b0bec806ac1156142267e805d70a55",
                            "status": "affected",
                            "version": "9cade7661a01b6e4d940386f482f48d148dbb1e6",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application exposes an AshTypescript RPC endpoint over HTTP and relies on Ash field policies to hide attributes on embedded resources that an action returns as a map.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "The application exposes an AshTypescript RPC endpoint over HTTP and relies on Ash field policies to hide attributes on embedded resources that an action returns as a map."
                        }
                    ],
                    "value": "The application exposes an AshTypescript RPC endpoint over HTTP and relies on Ash field policies to hide attributes on embedded resources that an action returns as a map."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "0.18.0",
                                    "versionStartIncluding": "0.11.0",
                                    "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": "Torkild Gundersen Kjevik / 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_typescript allows an unauthorized RPC caller to read attribute values that Ash field policies denied.</p>\n<p>When a field policy denies an attribute, Ash substitutes <code>%Ash.ForbiddenField{}</code>, which retains the real value in <code>original_value</code> because embedded resources must remain writable, and hides it from <code>Inspect</code> rather than removing it. <code>AshTypescript.Rpc.ResultProcessor</code> strips these markers to <code>nil</code> on its template-driven paths, but <code>normalize_primitive/1</code> in <code>lib/ash_typescript/rpc/result_processor.ex</code> had no such clause, so a marker fell through to the generic struct branch which calls <code>Map.from_struct/1</code> and serializes every key, <code>original_value</code> included. The denied value is returned to the caller inside the marker that represents its own denial.</p>\n<p>The simplest trigger is an action returning an embedded resource as a map, which routes through <code>normalize_resource_struct/2</code> with an empty template. <code>normalize_value_for_json/1</code> is a public, unguarded entry point to the same path.</p>\n<p>This issue affects ash_typescript: from 0.11.0 before 0.18.0.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "Incorrect Authorization vulnerability in ash-project ash_typescript allows an unauthorized RPC caller to read attribute values that Ash field policies denied.\n\nWhen a field policy denies an attribute, Ash substitutes `%Ash.ForbiddenField{}`, which retains the real value in `original_value` because embedded resources must remain writable, and hides it from `Inspect` rather than removing it. `AshTypescript.Rpc.ResultProcessor` strips these markers to `nil` on its template-driven paths, but `normalize_primitive/1` in `lib/ash_typescript/rpc/result_processor.ex` had no such clause, so a marker fell through to the generic struct branch which calls `Map.from_struct/1` and serializes every key, `original_value` included. The denied value is returned to the caller inside the marker that represents its own denial.\n\nThe simplest trigger is an action returning an embedded resource as a map, which routes through `normalize_resource_struct/2` with an empty template. `normalize_value_for_json/1` is a public, unguarded entry point to the same path.\n\nThis issue affects ash_typescript: from 0.11.0 before 0.18.0."
                        }
                    ],
                    "value": "Incorrect Authorization vulnerability in ash-project ash_typescript allows an unauthorized RPC caller to read attribute values that Ash field policies denied.\n\nWhen a field policy denies an attribute, Ash substitutes %Ash.ForbiddenField{}, which retains the real value in original_value because embedded resources must remain writable, and hides it from Inspect rather than removing it. AshTypescript.Rpc.ResultProcessor strips these markers to nil on its template-driven paths, but normalize_primitive/1 in lib/ash_typescript/rpc/result_processor.ex had no such clause, so a marker fell through to the generic struct branch which calls Map.from_struct/1 and serializes every key, original_value included. The denied value is returned to the caller inside the marker that represents its own denial.\n\nThe simplest trigger is an action returning an embedded resource as a map, which routes through normalize_resource_struct/2 with an empty template. normalize_value_for_json/1 is a public, unguarded entry point to the same path.\n\nThis issue affects ash_typescript: from 0.11.0 before 0.18.0."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-122",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-122 Privilege Abuse"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH",
                        "privilegesRequired": "NONE",
                        "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:N/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": "2026-09-01T02:09:01.851Z"
            },
            "references": [
                {
                    "tags": [
                        "related",
                        "vendor-advisory"
                    ],
                    "url": "https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-82730.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82730"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_typescript/commit/aa7f9f1967b0bec806ac1156142267e805d70a55"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "Authorization-redacted field values disclosed through AshTypescript result normalization"
        }
    }
}