Vulnerability-Lookup

CVE-2026-82730 (GCVE-0-2026-82730)

Vulnerability from cvelistv5 – Published: 2026-09-01 02:09 – Updated: 2026-09-01 14:54

Title

Authorization-redacted field values disclosed through AshTypescript result normalization

Summary

Incorrect Authorization vulnerability in ash-project ash_typescript allows an unauthorized RPC caller to read attribute values that Ash field policies denied. When 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. The 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. This issue affects ash_typescript: from 0.11.0 before 0.18.0.

Severity

8.2 (High)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 14:53 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

EEF mitre root

References

4 references

URL	Tags
https://github.com/ash-project/ash_typescript/sec…	relatedvendor-advisory
https://cna.erlef.org/cves/CVE-2026-82730.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-82730	related
https://github.com/ash-project/ash_typescript/com…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
ash-project	ash_typescript	Affected: 0.11.0 , < 0.18.0 (semver) cpe:2.3:a:ash-project:ash_typescript::::::::
ash-project	ash_typescript	Affected: 9cade7661a01b6e4d940386f482f48d148dbb1e6 , < aa7f9f1967b0bec806ac1156142267e805d70a55 (git) cpe:2.3:a:ash-project:ash_typescript::::::::

Credits

Peter Ullrich Peter Ullrich Torkild Gundersen Kjevik / Ash Project Jonatan Männchen / EEF

Show details on NVD website

JSON

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{\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Torkild Gundersen Kjevik / Ash Project\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}], \"impacts\": [{\"capecId\": \"CAPEC-122\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-122 Privilege Abuse\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 8.2, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"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\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ash-project/ash_typescript\", \"vendor\": \"ash-project\", \"modules\": [\"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027\"], \"product\": \"ash_typescript\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.11.0\", \"lessThan\": \"0.18.0\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/ash_typescript\", \"packageName\": \"ash_typescript\", \"programFiles\": [\"lib/ash_typescript/rpc/result_processor.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_primitive/1\"}, {\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_value_for_json/1\"}, {\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_resource_struct/2\"}]}, {\"cpes\": [\"cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ash-project/ash_typescript\", \"vendor\": \"ash-project\", \"modules\": [\"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027\"], \"product\": \"ash_typescript\", \"versions\": [{\"status\": \"affected\", \"version\": \"9cade7661a01b6e4d940386f482f48d148dbb1e6\", \"lessThan\": \"aa7f9f1967b0bec806ac1156142267e805d70a55\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/ash-project/ash_typescript\", \"packageName\": \"ash-project/ash_typescript\", \"programFiles\": [\"lib/ash_typescript/rpc/result_processor.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_primitive/1\"}, {\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_value_for_json/1\"}, {\"name\": \"\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_resource_struct/2\"}]}], \"references\": [{\"url\": \"https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62\", \"tags\": [\"related\", \"vendor-advisory\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-82730.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-82730\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/ash-project/ash_typescript/commit/aa7f9f1967b0bec806ac1156142267e805d70a55\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIncorrect Authorization vulnerability in ash-project ash_typescript allows an unauthorized RPC caller to read attribute values that Ash field policies denied.\u003c/p\u003e\\n\u003cp\u003eWhen a field policy denies an attribute, Ash substitutes \u003ccode\u003e%Ash.ForbiddenField{}\u003c/code\u003e, which retains the real value in \u003ccode\u003eoriginal_value\u003c/code\u003e because embedded resources must remain writable, and hides it from \u003ccode\u003eInspect\u003c/code\u003e rather than removing it. \u003ccode\u003eAshTypescript.Rpc.ResultProcessor\u003c/code\u003e strips these markers to \u003ccode\u003enil\u003c/code\u003e on its template-driven paths, but \u003ccode\u003enormalize_primitive/1\u003c/code\u003e in \u003ccode\u003elib/ash_typescript/rpc/result_processor.ex\u003c/code\u003e had no such clause, so a marker fell through to the generic struct branch which calls \u003ccode\u003eMap.from_struct/1\u003c/code\u003e and serializes every key, \u003ccode\u003eoriginal_value\u003c/code\u003e included. The denied value is returned to the caller inside the marker that represents its own denial.\u003c/p\u003e\\n\u003cp\u003eThe simplest trigger is an action returning an embedded resource as a map, which routes through \u003ccode\u003enormalize_resource_struct/2\u003c/code\u003e with an empty template. \u003ccode\u003enormalize_value_for_json/1\u003c/code\u003e is a public, unguarded entry point to the same path.\u003c/p\u003e\\n\u003cp\u003eThis issue affects ash_typescript: from 0.11.0 before 0.18.0.\u003c/p\u003e\", \"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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"configurations\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe 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.\u003c/p\u003e\", \"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.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.18.0\", \"versionStartIncluding\": \"0.11.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-09-01T02:09:01.851Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-82730\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T14:54:16.008Z\", \"dateReserved\": \"2026-08-31T00:59:08.960Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-09-01T02:09:01.851Z\", \"assignerShortName\": \"EEF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-82730

Vulnerability from fkie_nvd - Published: 2026-09-01 03:16 - Updated: 2026-09-01 21:15

Severity

8.2 (High) - 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

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-82730.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash_typescript/commit/aa7f9f1967b0bec806ac1156142267e805d70a55
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-82730
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027"
          ],
          "packageName": "ash_typescript",
          "packageURL": "pkg:hex/ash_typescript",
          "product": "ash_typescript",
          "programFiles": [
            "lib/ash_typescript/rpc/result_processor.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_primitive/1"
            },
            {
              "name": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_value_for_json/1"
            },
            {
              "name": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027: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": [
            "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027"
          ],
          "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": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_primitive/1"
            },
            {
              "name": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_value_for_json/1"
            },
            {
              "name": "\u0027Elixir.AshTypescript.Rpc.ResultProcessor\u0027:normalize_resource_struct/2"
            }
          ],
          "repo": "https://github.com/ash-project/ash_typescript",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "aa7f9f1967b0bec806ac1156142267e805d70a55",
              "status": "affected",
              "version": "9cade7661a01b6e4d940386f482f48d148dbb1e6",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "id": "CVE-2026-82730",
  "lastModified": "2026-09-01T21:15:00.147",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82730",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T14:53:56.550522Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-01T03:16:52.787",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-82730.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash_typescript/commit/aa7f9f1967b0bec806ac1156142267e805d70a55"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82730"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/ash-project/ash_typescript/security/advisories/GHSA-6929-rjmh-4x62"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.