CVE-2026-82739 (GCVE-0-2026-82739)

Vulnerability from cvelistv5 – Published: 2026-09-01 03:27 – Updated: 2026-09-01 12:44
VLAI
Title
Ash.Resource.Validation.Confirm leaks a confirmed field's stored value in the atomic mismatch error
Summary
Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash discloses the stored value of a confirmed field to an actor who fails its confirmation check. Ash.Resource.Validation.Confirm's atomic implementation (atomic/2 in lib/ash/resource/validation/confirm.ex) built the mismatch error with its value set to the field being confirmed. When the actor supplies only the confirmation argument and not the field itself, value resolves through atomic_ref/2 to the field's current stored value, so the mismatch error echoes that stored value back to the actor. Against a confirmation guarding a sensitive attribute, an actor can submit a deliberately wrong confirmation and read the real value from the returned error. The fix reports the actor-supplied confirmation in the error instead of the stored field value. This issue affects ash: from 2.17.20 before 3.32.2.
Severity
2.1 (Low)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/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 12:43 UTC
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
EEF CNA under the mitre root
CNA scorecard A 97/100 over 313 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ash-project ash Affected: 2.17.20 , < 3.32.2 (semver)
    cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*
Create a notification for this product.
ash-project ash Affected: fadecf3ee95640bd3bc7298df4799e0375537fd2 , < 7dfe5f0b1ba4267580ded947dc861351d4dc8e2b (git)
    cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Jonatan Männchen / EEF Peter Ullrich Zach Daniel / Ash Project Peter Ullrich
Show details on NVD website
To clipboard 

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              "value": "Zach Daniel / Ash Project"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "Peter Ullrich"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eGeneration of Error Message Containing Sensitive Information vulnerability in ash-project ash discloses the stored value of a confirmed field to an actor who fails its confirmation check.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eAsh.Resource.Validation.Confirm\u003c/code\u003e\u0027s atomic implementation (\u003ccode\u003eatomic/2\u003c/code\u003e in \u003ccode\u003elib/ash/resource/validation/confirm.ex\u003c/code\u003e) built the mismatch error with its \u003ccode\u003evalue\u003c/code\u003e set to the field being confirmed. When the actor supplies only the confirmation argument and not the field itself, \u003ccode\u003evalue\u003c/code\u003e resolves through \u003ccode\u003eatomic_ref/2\u003c/code\u003e to the field\u0027s current stored value, so the mismatch error echoes that stored value back to the actor. Against a confirmation guarding a sensitive attribute, an actor can submit a deliberately wrong confirmation and read the real value from the returned error. The fix reports the actor-supplied confirmation in the error instead of the stored field value.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash: from 2.17.20 before 3.32.2.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash discloses the stored value of a confirmed field to an actor who fails its confirmation check.\n\n`Ash.Resource.Validation.Confirm`\u0027s atomic implementation (`atomic/2` in `lib/ash/resource/validation/confirm.ex`) built the mismatch error with its `value` set to the field being confirmed. When the actor supplies only the confirmation argument and not the field itself, `value` resolves through `atomic_ref/2` to the field\u0027s current stored value, so the mismatch error echoes that stored value back to the actor. Against a confirmation guarding a sensitive attribute, an actor can submit a deliberately wrong confirmation and read the real value from the returned error. The fix reports the actor-supplied confirmation in the error instead of the stored field value.\n\nThis issue affects ash: from 2.17.20 before 3.32.2."
                }
              ],
              "value": "Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash discloses the stored value of a confirmed field to an actor who fails its confirmation check.\n\nAsh.Resource.Validation.Confirm\u0027s atomic implementation (atomic/2 in lib/ash/resource/validation/confirm.ex) built the mismatch error with its value set to the field being confirmed. When the actor supplies only the confirmation argument and not the field itself, value resolves through atomic_ref/2 to the field\u0027s current stored value, so the mismatch error echoes that stored value back to the actor. Against a confirmation guarding a sensitive attribute, an actor can submit a deliberately wrong confirmation and read the real value from the returned error. The fix reports the actor-supplied confirmation in the error instead of the stored field value.\n\nThis issue affects ash: from 2.17.20 before 3.32.2."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-54",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-54 Query System for Information"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "LOCAL",
                "baseScore": 2.1,
                "baseSeverity": "LOW",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "LOW",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-209",
                  "description": "CWE-209 Generation of Error Message Containing Sensitive Information",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-01T03:27:58.165Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/ash-project/ash/security/advisories/GHSA-66cg-vj5m-8w7v"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-82739.html"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82739"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/ash-project/ash/commit/7dfe5f0b1ba4267580ded947dc861351d4dc8e2b"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Ash.Resource.Validation.Confirm leaks a confirmed field\u0027s stored value in the atomic mismatch error"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-82739",
        "datePublished": "2026-09-01T03:27:58.165Z",
        "dateReserved": "2026-08-31T00:59:10.002Z",
        "dateUpdated": "2026-09-01T12:44:21.482Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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