CVE-2026-70395 (GCVE-0-2026-70395)
Vulnerability from cvelistv5 – Published: 2026-08-09 18:17 – Updated: 2026-08-10 18:23
VLAI
EPSS
VEX
Title
Predicate injection in manage_relationship belongs_to lookup discloses secret lookup keys in Ash
Summary
Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash allows an attacker to forge a relationship to a record they cannot name, and to recover the secret value used to look it up.
When manage_relationship is used with on_lookup: :relate on a belongs_to relationship, the client-supplied lookup value is passed to Ash.Query.filter/2 without being cast to the attribute type. A nested map submitted where a scalar is expected is therefore interpreted as a filter predicate rather than a literal, so a lookup for a specific record becomes a query for any record matching a condition. The same path omits Ash.Query.limit(1), leaving Ash.read_one/2 able to distinguish no match from one match from several, which turns comparison predicates into an oracle for the lookup value. Authorization is unaffected; the destination read policy still applies.
This issue affects ash: from 1.52.0-rc.11 before 3.31.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 15:56 UTC
CWE
- CWE-943 - Improper Neutralization of Special Elements in Data Query Logic
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash/security/advis… | relatedvendor-advisory |
| https://cna.erlef.org/cves/CVE-2026-70395.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-70395 | related |
| https://github.com/ash-project/ash/commit/09f4259… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ash-project | ash |
Affected:
1.52.0-rc.11 , < 3.31.1
(semver)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
|
| ash-project | ash |
Affected:
571c138140e71cea24005189f45d7a63c8d2ed20 , < 09f42593035bceb0f6153dd7ee45cc49d108300a
(git)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
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Authorization is unaffected; the destination read policy still applies.\\n\\nThis issue affects ash: from 1.52.0-rc.11 before 3.31.1.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eImproper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash allows an attacker to forge a relationship to a record they cannot name, and to recover the secret value used to look it up.\u003c/p\u003e\\n\u003cp\u003eWhen \u003ccode\u003emanage_relationship\u003c/code\u003e is used with \u003ccode\u003eon_lookup: :relate\u003c/code\u003e on a \u003ccode\u003ebelongs_to\u003c/code\u003e relationship, the client-supplied lookup value is passed to \u003ccode\u003eAsh.Query.filter/2\u003c/code\u003e without being cast to the attribute type. A nested map submitted where a scalar is expected is therefore interpreted as a filter predicate rather than a literal, so a lookup for a specific record becomes a query for any record matching a condition. The same path omits \u003ccode\u003eAsh.Query.limit(1)\u003c/code\u003e, leaving \u003ccode\u003eAsh.read_one/2\u003c/code\u003e able to distinguish no match from one match from several, which turns comparison predicates into an oracle for the lookup value. Authorization is unaffected; the destination read policy still applies.\u003c/p\u003e\\n\u003cp\u003eThis issue affects ash: from 1.52.0-rc.11 before 3.31.1.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash allows an attacker to forge a relationship to a record they cannot name, and to recover the secret value used to look it up.\\n\\nWhen `manage_relationship` is used with `on_lookup: :relate` on a `belongs_to` relationship, the client-supplied lookup value is passed to `Ash.Query.filter/2` without being cast to the attribute type. A nested map submitted where a scalar is expected is therefore interpreted as a filter predicate rather than a literal, so a lookup for a specific record becomes a query for any record matching a condition. The same path omits `Ash.Query.limit(1)`, leaving `Ash.read_one/2` able to distinguish no match from one match from several, which turns comparison predicates into an oracle for the lookup value. Authorization is unaffected; the destination read policy still applies.\\n\\nThis issue affects ash: from 1.52.0-rc.11 before 3.31.1.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-943\", \"description\": \"CWE-943 Improper Neutralization of Special Elements in Data Query Logic\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"A belongs_to relationship must be managed with manage_relationship using on_lookup: :relate, and the lookup value must come from client input.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eA \u003ccode\u003ebelongs_to\u003c/code\u003e relationship must be managed with \u003ccode\u003emanage_relationship\u003c/code\u003e using \u003ccode\u003eon_lookup: :relate\u003c/code\u003e, and the lookup value must come from client input.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"A `belongs_to` relationship must be managed with `manage_relationship` using `on_lookup: :relate`, and the lookup value must come from client input.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.31.1\", \"versionStartIncluding\": \"1.52.0-rc.11\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-08-09T18:17:07.321Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-70395\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-10T15:56:57.175785Z\"}}}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-08-10T15:57:01.472Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-70395\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-09T18:17:07.321Z\", \"dateReserved\": \"2026-08-04T14:30:01.369Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-08-09T18:17:07.321Z\", \"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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