Vulnerability-Lookup

CVE-2026-82746 (GCVE-0-2026-82746)

Vulnerability from cvelistv5 – Published: 2026-09-01 03:47 – Updated: 2026-09-01 03:47

Title

Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to forbidden records

Summary

Missing Authorization vulnerability in ash-project ash allows an actor to update records forbidden by resource policies through the atomic path of Ash.update_many/4. Ash.update_many/4 runs as a single atomic statement (a data-layer update_many, for example a SQL MERGE) whenever an atomic strategy is used and the data layer supports it. Ash.Actions.Update.UpdateMany (lib/ash/actions/update/update_many.ex) took that path even under authorize?: true without applying the resource's policies, so the statement updated every row matched by primary key regardless of the policy filter that authorization would impose. An actor could therefore update records the policies forbid, such as rows belonging to another actor or tenant. The fix restricts the atomic path to data layers supporting changeset filters when authorizing, authorizes each changeset, and merges the resulting policy filter into each changeset so the statement only touches authorized rows. This issue affects ash: from 3.29.0 before 3.32.2.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-862 - Missing Authorization

Assigner

EEF mitre root

References

4 references

URL	Tags
https://github.com/ash-project/ash/security/advis…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-82746.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-82746	related
https://github.com/ash-project/ash/commit/ed4e656…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
ash-project	ash	Affected: 3.29.0 , < 3.32.2 (semver) cpe:2.3:a:ash-project:ash::::::::
ash-project	ash	Affected: 45e6b4ec7b2dc076afe614aa7aef7e1f15b5e335 , < ed4e656822ffe83f8e960d5de0b573c0d1ae7f29 (git) cpe:2.3:a:ash-project:ash::::::::

Credits

Jonatan Männchen / EEF Zach Daniel / Ash Project Peter Ullrich Peter Ullrich

Show details on NVD website

JSON

To clipboard

{
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      "title": "Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to forbidden records"
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  }
}

FKIE_CVE-2026-82746

Vulnerability from fkie_nvd - Published: 2026-09-01 04:18 - Updated: 2026-09-01 04:18

Severity

5.9 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-82746.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash/commit/ed4e656822ffe83f8e960d5de0b573c0d1ae7f29
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash/security/advisories/GHSA-j7c9-3fw3-jc64
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-82746

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
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            "\u0027Elixir.Ash.Actions.Update.UpdateMany\u0027"
          ],
          "packageName": "ash",
          "packageURL": "pkg:hex/ash",
          "product": "ash",
          "programFiles": [
            "lib/ash/actions/update/update_many.ex"
          ],
          "programRoutines": [
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            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "3.32.2",
              "status": "affected",
              "version": "3.29.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
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            "\u0027Elixir.Ash.Actions.Update.UpdateMany\u0027"
          ],
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          "product": "ash",
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            "lib/ash/actions/update/update_many.ex"
          ],
          "programRoutines": [
            {
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            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "ed4e656822ffe83f8e960d5de0b573c0d1ae7f29",
              "status": "affected",
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    }
  ],
  "id": "CVE-2026-82746",
  "lastModified": "2026-09-01T04:18:04.977",
  "metrics": {
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          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "version": "4.0",
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    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash/commit/ed4e656822ffe83f8e960d5de0b573c0d1ae7f29"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-j7c9-3fw3-jc64"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82746"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "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.

Action not permitted

CVE-2026-82746 (GCVE-0-2026-82746)

FKIE_CVE-2026-82746

Tags

Sightings

Nomenclature