Medium

AshAi aggregate tool can read field-policy-protected fields

Type: advisorySources: OSV

AshAi exposes Ash read actions to language-model tool calls. The read tool accepts an aggregate result type (min, max, sum, avg) that builds an ad-hoc Ash.Query.Aggregate over a named field and returns its raw value. Ash field policies redact forbidden fields on returned records (replacing them with %Ash.ForbiddenField{}), but that redaction does not apply to aggregate values. A tool caller could therefore read a field the calling actor's field policies forbid by requesting it as an aggregate; min/max in particular return an actual field value. This includes fields that are public? true but restricted per-actor by a field policy, such as sensitive PII. The tool's existing check only required the field to be public, which is a separate axis from per-actor field-policy authorization. The fix authorizes the aggregated field against the resource's field policies, so aggregating over a field the actor may not see is refused or scoped to the rows where it is visible. This issue affects ash_ai: from 0.1.0 before 1.0.3.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-78230
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 08:36 UTC · Revision 1

Source evidence

AshAi aggregate tool can read field-policy-protected fields

core-osv · Original source

Published 8 Sept 2026, 16:41 UTC

osv:CVE-2026-78230

Complete source record

{
  "id": "bf21cb69389fca9dfe6c7c83620a43466e9d70f86ea032db1a219cfe28bed8d8",
  "url": "https://osv.dev/vulnerability/CVE-2026-78230",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "AshAi aggregate tool can read field-policy-protected fields",
    "summary": "AshAi exposes Ash read actions to language-model tool calls. The read tool accepts an aggregate result type (min, max, sum, avg) that builds an ad-hoc Ash.Query.Aggregate over a named field and returns its raw value. Ash field policies redact forbidden fields on returned records (replacing them with %Ash.ForbiddenField{}), but that redaction does not apply to aggregate values. A tool caller could therefore read a field the calling actor's field policies forbid by requesting it as an aggregate; min/max in particular return an actual field value. This includes fields that are public? true but restricted per-actor by a field policy, such as sensitive PII. The tool's existing check only required the field to be public, which is a separate axis from per-actor field-policy authorization. The fix authorizes the aggregated field against the resource's field policies, so aggregating over a field the actor may not see is refused or scoped to the rows where it is visible. This issue affects ash_ai: from 0.1.0 before 1.0.3.",
    "evidence": "osv:CVE-2026-78230",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-78230",
      "aliases": [
        "CVE-2026-78230",
        "EEF-CVE-2026-78230",
        "GHSA-v5rw-36x5-r5vx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ash-project/ash_ai",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2ba234b50946a3b8116190c8467f9f4dfa5edce7"
                },
                {
                  "fixed": "9c02de581625c342c9870a672830bff28c1d701e"
                },
                {
                  "introduced": "9be71660e448d601b6b5d1846d227c0b52fb64ac"
                },
                {
                  "fixed": "0c8ac876d7a8a8757fe8883da1600d03069060c7"
                },
                {
                  "fixed": "2ba234b50946a3b8116190c8467f9f4dfa5edce7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2ba234b50946a3b8116190c8467f9f4dfa5edce7"
                      },
                      {
                        "fixed": "9c02de581625c342c9870a672830bff28c1d701e"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0.1.0"
                      },
                      {
                        "fixed": "1.0.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2ba234b50946a3b8116190c8467f9f4dfa5edce7"
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                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
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                        "fixed": "9c02de581625c342c9870a672830bff28c1d701e"
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                    "source": "REFERENCES_COMMIT"
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          ],
          "versions": [
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            "v0.7.3",
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            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.0",
            "v0.2.14",
            "v0.2.13",
            "v0.2.12",
            "v0.2.11",
            "v0.2.10",
            "v0.2.9",
            "v0.2.8",
            "v0.2.7",
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            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.1.11",
            "v0.1.10",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78230.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.258327683Z",
      "provider": "osv",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-78230.html",
        "https://github.com",
        "https://osv.dev/vulnerability/EEF-CVE-2026-78230",
        "https://repo.hex.pm",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78230.json",
        "https://github.com/ash-project/ash_ai/security/advisories/GHSA-v5rw-36x5-r5vx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-78230",
        "https://github.com/ash-project/ash_ai/commit/2ba234b50946a3b8116190c8467f9f4dfa5edce7",
        "https://github.com/ash-project/ash_ai/commit/9c02de581625c342c9870a672830bff28c1d701e",
        "https://github.com/ash-project/ash_ai"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1220"
        ],
        "cna_assigner": "EEF",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78230.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-78230",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493884,
  "published_at": "2026-09-08T16:41:45.975+00:00"
}