CVE-2026-101028 (GCVE-0-2026-101028)
Vulnerability from cvelistv5 – Published: 2026-10-09 07:01 – Updated: 2026-10-09 18:04
VLAI
EPSS
VEX
Title
Ash.count, Ash.exists and Ash.aggregate skip related resources' read policies in filters and sorts
Summary
Incorrect Authorization vulnerability in ash-project ash allows an actor to infer data in related records they cannot read via Ash.count/2, Ash.exists/2 and Ash.aggregate/3.
Ash.Actions.Aggregate.run/4 (lib/ash/actions/aggregate.ex) applied only the root resource's read policy before running the aggregate query. The read path also applies each related resource's read policy to filter and sort references that cross a relationship, directly (for example comments.body) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through Ash.Query.filter_input/2, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. Ash.read/2 and its page counts are not affected.
This issue affects ash: from 2.6.0 before 3.34.6.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 18:03 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash/security/advis… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-101028.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-101028 | related |
| https://github.com/ash-project/ash/commit/30eaf1c… | related |
| https://github.com/ash-project/ash/commit/8093618… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash |
Affected:
2.6.0 , < 3.34.6
(semver)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
||
| ash-project | ash |
Affected:
30eaf1c6e8524527b703e3c4bfeff7967ee0b37c , < 80936187b27ee94f15cd875affd3141b5cb23185
(git)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
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"tags": [
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],
"url": "https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Ash.Actions.Aggregate\u0027",
"\u0027Elixir.Ash\u0027"
],
"packageName": "ash",
"packageURL": "pkg:hex/ash",
"product": "ash",
"programFiles": [
"lib/ash/actions/aggregate.ex",
"lib/ash.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Ash.Actions.Aggregate\u0027:run/4"
},
{
"name": "\u0027Elixir.Ash\u0027:count/2"
},
{
"name": "\u0027Elixir.Ash\u0027:exists/2"
},
{
"name": "\u0027Elixir.Ash\u0027:aggregate/3"
}
],
"repo": "https://github.com/ash-project/ash",
"vendor": "ash-project",
"versions": [
{
"lessThan": "3.34.6",
"status": "affected",
"version": "2.6.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Ash.Actions.Aggregate\u0027",
"\u0027Elixir.Ash\u0027"
],
"packageName": "ash-project/ash",
"packageURL": "pkg:github/ash-project/ash",
"product": "ash",
"programFiles": [
"lib/ash/actions/aggregate.ex",
"lib/ash.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Ash.Actions.Aggregate\u0027:run/4"
},
{
"name": "\u0027Elixir.Ash\u0027:count/2"
},
{
"name": "\u0027Elixir.Ash\u0027:exists/2"
},
{
"name": "\u0027Elixir.Ash\u0027:aggregate/3"
}
],
"repo": "https://github.com/ash-project/ash",
"vendor": "ash-project",
"versions": [
{
"lessThan": "80936187b27ee94f15cd875affd3141b5cb23185",
"status": "affected",
"version": "30eaf1c6e8524527b703e3c4bfeff7967ee0b37c",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eReachable only when an application passes caller-supplied filters or sorts that cross a relationship into \u003ccode\u003eAsh.count/2\u003c/code\u003e, \u003ccode\u003eAsh.exists/2\u003c/code\u003e or \u003ccode\u003eAsh.aggregate/3\u003c/code\u003e (directly, through ash_lua read operations, or through AshAi count, exists or aggregate result types), and a related resource\u0027s read policy is stricter than the root resource\u0027s.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Reachable only when an application passes caller-supplied filters or sorts that cross a relationship into `Ash.count/2`, `Ash.exists/2` or `Ash.aggregate/3` (directly, through ash_lua read operations, or through AshAi count, exists or aggregate result types), and a related resource\u0027s read policy is stricter than the root resource\u0027s."
}
],
"value": "Reachable only when an application passes caller-supplied filters or sorts that cross a relationship into Ash.count/2, Ash.exists/2 or Ash.aggregate/3 (directly, through ash_lua read operations, or through AshAi count, exists or aggregate result types), and a related resource\u0027s read policy is stricter than the root resource\u0027s."
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.34.6",
"versionStartIncluding": "2.6.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Glenn Rempe"
},
{
"lang": "en",
"type": "finder",
"value": "Glenn Rempe"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Zach Daniel / Ash Project"
}
],
"dateAssigned": "2026-10-09T00:19:31.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eIncorrect Authorization vulnerability in ash-project ash allows an actor to infer data in related records they cannot read via \u003ccode\u003eAsh.count/2\u003c/code\u003e, \u003ccode\u003eAsh.exists/2\u003c/code\u003e and \u003ccode\u003eAsh.aggregate/3\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eAsh.Actions.Aggregate.run/4\u003c/code\u003e (\u003ccode\u003elib/ash/actions/aggregate.ex\u003c/code\u003e) applied only the root resource\u0027s read policy before running the aggregate query. The read path also applies each related resource\u0027s read policy to filter and sort references that cross a relationship, directly (for example \u003ccode\u003ecomments.body\u003c/code\u003e) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through \u003ccode\u003eAsh.Query.filter_input/2\u003c/code\u003e, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. \u003ccode\u003eAsh.read/2\u003c/code\u003e and its page counts are not affected.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash: from 2.6.0 before 3.34.6.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Incorrect Authorization vulnerability in ash-project ash allows an actor to infer data in related records they cannot read via `Ash.count/2`, `Ash.exists/2` and `Ash.aggregate/3`.\n\n`Ash.Actions.Aggregate.run/4` (`lib/ash/actions/aggregate.ex`) applied only the root resource\u0027s read policy before running the aggregate query. The read path also applies each related resource\u0027s read policy to filter and sort references that cross a relationship, directly (for example `comments.body`) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through `Ash.Query.filter_input/2`, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. `Ash.read/2` and its page counts are not affected.\n\nThis issue affects ash: from 2.6.0 before 3.34.6."
}
],
"value": "Incorrect Authorization vulnerability in ash-project ash allows an actor to infer data in related records they cannot read via Ash.count/2, Ash.exists/2 and Ash.aggregate/3.\n\nAsh.Actions.Aggregate.run/4 (lib/ash/actions/aggregate.ex) applied only the root resource\u0027s read policy before running the aggregate query. The read path also applies each related resource\u0027s read policy to filter and sort references that cross a relationship, directly (for example comments.body) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through Ash.Query.filter_input/2, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. Ash.read/2 and its page counts are not affected.\n\nThis issue affects ash: from 2.6.0 before 3.34.6."
}
],
"impacts": [
{
"capecId": "CAPEC-1",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"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:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863 Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-09T07:01:06.470Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"name": "GHSA-xj24-8f5c-pp5p",
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p"
},
{
"name": "EEF CNA record for CVE-2026-101028",
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-101028.html"
},
{
"name": "OSV record EEF-CVE-2026-101028",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-101028"
},
{
"name": "Introducing commit 30eaf1c in ash-project/ash",
"tags": [
"related"
],
"url": "https://github.com/ash-project/ash/commit/30eaf1c6e8524527b703e3c4bfeff7967ee0b37c"
},
{
"name": "Fix commit 8093618 in ash-project/ash",
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash/commit/80936187b27ee94f15cd875affd3141b5cb23185"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Ash.count, Ash.exists and Ash.aggregate skip related resources\u0027 read policies in filters and sorts"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-101028",
"datePublished": "2026-10-09T07:01:06.470Z",
"dateReserved": "2026-10-08T15:45:02.376Z",
"dateUpdated": "2026-10-09T18:04:24.729Z",
"state": "PUBLISHED"
},
"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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
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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.
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