CVE-2026-82739 (GCVE-0-2026-82739)
Vulnerability from cvelistv5 – Published: 2026-09-01 03:27 – Updated: 2026-09-01 12:44
VLAI
EPSS
VEX
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
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
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash/security/advis… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-82739.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-82739 | related |
| https://github.com/ash-project/ash/commit/7dfe5f0… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash |
Affected:
2.17.20 , < 3.32.2
(semver)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
||
| ash-project | ash |
Affected:
fadecf3ee95640bd3bc7298df4799e0375537fd2 , < 7dfe5f0b1ba4267580ded947dc861351d4dc8e2b
(git)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
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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.\", \"supportingMedia\": [{\"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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-209\", \"description\": \"CWE-209 Generation of Error Message Containing Sensitive Information\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.32.2\", \"versionStartIncluding\": \"2.17.20\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-09-01T03:27:58.165Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-82739\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T12:44:21.482Z\", \"dateReserved\": \"2026-08-31T00:59:10.002Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-09-01T03:27:58.165Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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