{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-86338",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-86338",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T08:28:44.114Z",
    "updatedAt": "2026-09-16T14:49:17.203Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Ash field policies do not filter-nil forbidden calculations and aggregates, enabling an information-disclosure oracle",
      "summary": "Ash field_policies are documented to protect against filter-based information disclosure: when a field the actor may not see is referenced in a filter, it is replaced with an expression that evaluates to nil, so a filter cannot be used as a yes/no oracle to read a value the actor cannot see.\n\nThis nilling was applied to attributes but not to calculations or aggregates. A user-supplied filter reference to a calculation or aggregate carries an Ash.Query.Calculation / Ash.Query.Aggregate struct, which the authorizer's reference replacement did not match (it only matched the Ash.Resource.* structs), so the filter ran against the real value.\n\nAs a result, an actor whose field policies forbid a calculation or aggregate can still filter by it (for example filter(secret_calc == \"x\") or filter(comment_count == n)) and learn the value from whether rows match — an oracle that recovers field-policy-protected values one probe at a time. Filtering is commonly exposed to lower-privileged actors (for example via AshGraphql or AshJsonApi filter arguments), which is exactly the surface field policies are meant to protect.\n\nThe fix routes filter references to calculations and aggregates through the same field-policy nilling as attributes.\n\nThis issue affects ash: from 2.11.0-rc.0 before 3.33.4.",
      "affected": [
        {
          "vendor": "ash-project",
          "product": "ash",
          "packageName": "ash",
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.11.0-rc.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.33.4"
            }
          ]
        },
        {
          "vendor": "ash-project",
          "product": "ash",
          "packageName": "ash-project/ash",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0b6d93c7c4637280b46ae66ea1d2eaf013701238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b3d4503241f3deacb5ceb955e10a4fa927da0f67"
            }
          ]
        }
      ]
    }
  }
}