CVE-2026-82749 (GCVE-0-2026-82749)
Vulnerability from cvelistv5 – Published: 2026-09-01 03:54 – Updated: 2026-09-01 12:38
VLAI
EPSS
VEX
Title
Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is unresolved, leaking scoped records
Summary
Incorrect Authorization vulnerability in ash-project ash widens a relationship's parent(...) scoping filter to match unintended records when the referenced parent field cannot be resolved.
Loading a relationship whose filter references parent(...) resolves that expression against the parent record. resolve_parent_in_filter/3 (lib/ash/actions/read/relationships.ex) resolved an unresolvable parent reference (for example when the referenced field was not selected on the source query) to nil rather than failing. A scoping predicate such as org_id == parent(org_id) then becomes an IS NULL match, and a guard like is_nil(parent(org_id)) or org_id == parent(org_id) activates its unrestricted branch, so the relationship returns records the scope was meant to exclude. The fix fails the read with an error when a parent(...) reference cannot be resolved, instead of defaulting to nil.
This issue affects ash: from 3.13.2 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 12:37 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash/security/advis… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-82749.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-82749 | related |
| https://github.com/ash-project/ash/commit/e52dad2… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash |
Affected:
3.13.2 , < 3.32.2
(semver)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
||
| ash-project | ash |
Affected:
0ddff26e6e6bc6d182e1af2f98b431575e5b4179 , < e52dad2c39a35f6f043f7324d26e4f4e2551dfd2
(git)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
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"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eIncorrect Authorization vulnerability in ash-project ash widens a relationship\u0027s \u003ccode\u003eparent(...)\u003c/code\u003e scoping filter to match unintended records when the referenced parent field cannot be resolved.\u003c/p\u003e\n\u003cp\u003eLoading a relationship whose filter references \u003ccode\u003eparent(...)\u003c/code\u003e resolves that expression against the parent record. \u003ccode\u003eresolve_parent_in_filter/3\u003c/code\u003e (\u003ccode\u003elib/ash/actions/read/relationships.ex\u003c/code\u003e) resolved an unresolvable parent reference (for example when the referenced field was not selected on the source query) to \u003ccode\u003enil\u003c/code\u003e rather than failing. A scoping predicate such as \u003ccode\u003eorg_id == parent(org_id)\u003c/code\u003e then becomes an \u003ccode\u003eIS NULL\u003c/code\u003e match, and a guard like \u003ccode\u003eis_nil(parent(org_id)) or org_id == parent(org_id)\u003c/code\u003e activates its unrestricted branch, so the relationship returns records the scope was meant to exclude. The fix fails the read with an error when a \u003ccode\u003eparent(...)\u003c/code\u003e reference cannot be resolved, instead of defaulting to nil.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash: from 3.13.2 before 3.32.2.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Incorrect Authorization vulnerability in ash-project ash widens a relationship\u0027s `parent(...)` scoping filter to match unintended records when the referenced parent field cannot be resolved.\n\nLoading a relationship whose filter references `parent(...)` resolves that expression against the parent record. `resolve_parent_in_filter/3` (`lib/ash/actions/read/relationships.ex`) resolved an unresolvable parent reference (for example when the referenced field was not selected on the source query) to `nil` rather than failing. A scoping predicate such as `org_id == parent(org_id)` then becomes an `IS NULL` match, and a guard like `is_nil(parent(org_id)) or org_id == parent(org_id)` activates its unrestricted branch, so the relationship returns records the scope was meant to exclude. The fix fails the read with an error when a `parent(...)` reference cannot be resolved, instead of defaulting to nil.\n\nThis issue affects ash: from 3.13.2 before 3.32.2."
}
],
"value": "Incorrect Authorization vulnerability in ash-project ash widens a relationship\u0027s parent(...) scoping filter to match unintended records when the referenced parent field cannot be resolved.\n\nLoading a relationship whose filter references parent(...) resolves that expression against the parent record. resolve_parent_in_filter/3 (lib/ash/actions/read/relationships.ex) resolved an unresolvable parent reference (for example when the referenced field was not selected on the source query) to nil rather than failing. A scoping predicate such as org_id == parent(org_id) then becomes an IS NULL match, and a guard like is_nil(parent(org_id)) or org_id == parent(org_id) activates its unrestricted branch, so the relationship returns records the scope was meant to exclude. The fix fails the read with an error when a parent(...) reference cannot be resolved, instead of defaulting to nil.\n\nThis issue affects ash: from 3.13.2 before 3.32.2."
}
],
"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": "LOCAL",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"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: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": "2026-09-01T03:54:12.716Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash/security/advisories/GHSA-j8fx-ff37-4j9c"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-82749.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-82749"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash/commit/e52dad2c39a35f6f043f7324d26e4f4e2551dfd2"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is unresolved, leaking scoped records"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-82749",
"datePublished": "2026-09-01T03:54:12.716Z",
"dateReserved": "2026-08-31T01:00:09.774Z",
"dateUpdated": "2026-09-01T12:38:27.534Z",
"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
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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.