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": [
"exploit"
],
"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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.