CVE-2026-82747 (GCVE-0-2026-82747)
Vulnerability from cvelistv5
Published
2026-09-01 04:14
Modified
2026-09-01 12:36
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-863 - Incorrect Authorization
Summary
Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.
When a resource has an access_type :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in check_result/1 (lib/ash/policy/authorizer/authorizer.ex) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record ({[record | data], authorizer, any_forbidden?}) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.
This issue affects ash: from 3.4.44 before 3.32.2.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ash-project | ash |
Version: 3.4.44 ≤ cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-82747",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T12:36:21.694323Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T12:36:50.341Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Ash.Policy.Authorizer\u0027"
],
"packageName": "ash",
"packageURL": "pkg:hex/ash",
"product": "ash",
"programFiles": [
"lib/ash/policy/authorizer/authorizer.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Ash.Policy.Authorizer\u0027:check_result/1"
}
],
"repo": "https://github.com/ash-project/ash",
"vendor": "ash-project",
"versions": [
{
"lessThan": "3.32.2",
"status": "affected",
"version": "3.4.44",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Ash.Policy.Authorizer\u0027"
],
"packageName": "ash-project/ash",
"packageURL": "pkg:github/ash-project/ash",
"product": "ash",
"programFiles": [
"lib/ash/policy/authorizer/authorizer.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Ash.Policy.Authorizer\u0027:check_result/1"
}
],
"repo": "https://github.com/ash-project/ash",
"vendor": "ash-project",
"versions": [
{
"lessThan": "6eddb8ab26e45023faf0c79ebd152bb40aefda02",
"status": "affected",
"version": "f4a8ff53fd3b974468d73685cd3fc842ef893de3",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.32.2",
"versionStartIncluding": "3.4.44",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Zach Daniel / Ash Project"
},
{
"lang": "en",
"type": "reporter",
"value": "Peter Ullrich"
},
{
"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 returns records that a runtime read policy denies to any actor.\u003c/p\u003e\n\u003cp\u003eWhen a resource has an \u003ccode\u003eaccess_type :runtime\u003c/code\u003e read policy (a check evaluated per record rather than compiled to a filter), \u003ccode\u003eAsh.Policy.Authorizer\u003c/code\u003e decides each record in \u003ccode\u003echeck_result/1\u003c/code\u003e (\u003ccode\u003elib/ash/policy/authorizer/authorizer.ex\u003c/code\u003e) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record (\u003ccode\u003e{[record | data], authorizer, any_forbidden?}\u003c/code\u003e) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash: from 3.4.44 before 3.32.2.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\n\nWhen a resource has an `access_type :runtime` read policy (a check evaluated per record rather than compiled to a filter), `Ash.Policy.Authorizer` decides each record in `check_result/1` (`lib/ash/policy/authorizer/authorizer.ex`) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record (`{[record | data], authorizer, any_forbidden?}`) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\n\nThis issue affects ash: from 3.4.44 before 3.32.2."
}
],
"value": "Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\n\nWhen a resource has an access_type :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in check_result/1 (lib/ash/policy/authorizer/authorizer.ex) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record ({[record | data], authorizer, any_forbidden?}) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\n\nThis issue affects ash: from 3.4.44 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": "2026-09-01T04:14:57.840Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-82747.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-82747"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash/commit/6eddb8ab26e45023faf0c79ebd152bb40aefda02"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Ash.Policy.Authorizer returns records denied by a runtime read policy to any actor"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-82747",
"datePublished": "2026-09-01T04:14:57.840Z",
"dateReserved": "2026-08-31T01:00:09.774Z",
"dateUpdated": "2026-09-01T12:36:50.341Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-82747\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-01T12:36:21.694323Z\"}}}], \"references\": [{\"url\": \"https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-01T12:36:39.634Z\"}}], \"cna\": {\"title\": \"Ash.Policy.Authorizer returns records denied by a runtime read policy to any actor\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Zach Daniel / Ash Project\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Peter Ullrich\"}], \"impacts\": [{\"capecId\": \"CAPEC-1\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 5.9, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"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\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ash-project/ash\", \"vendor\": \"ash-project\", \"modules\": [\"\u0027Elixir.Ash.Policy.Authorizer\u0027\"], \"product\": \"ash\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.4.44\", \"lessThan\": \"3.32.2\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/ash\", \"packageName\": \"ash\", \"programFiles\": [\"lib/ash/policy/authorizer/authorizer.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Ash.Policy.Authorizer\u0027:check_result/1\"}]}, {\"cpes\": [\"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ash-project/ash\", \"vendor\": \"ash-project\", \"modules\": [\"\u0027Elixir.Ash.Policy.Authorizer\u0027\"], \"product\": \"ash\", \"versions\": [{\"status\": \"affected\", \"version\": \"f4a8ff53fd3b974468d73685cd3fc842ef893de3\", \"lessThan\": \"6eddb8ab26e45023faf0c79ebd152bb40aefda02\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/ash-project/ash\", \"packageName\": \"ash-project/ash\", \"programFiles\": [\"lib/ash/policy/authorizer/authorizer.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Ash.Policy.Authorizer\u0027:check_result/1\"}]}], \"references\": [{\"url\": \"https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-82747.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-82747\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/ash-project/ash/commit/6eddb8ab26e45023faf0c79ebd152bb40aefda02\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\\n\\nWhen a resource has an access_type :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in check_result/1 (lib/ash/policy/authorizer/authorizer.ex) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record ({[record | data], authorizer, any_forbidden?}) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\\n\\nThis issue affects ash: from 3.4.44 before 3.32.2.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIncorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\u003c/p\u003e\\n\u003cp\u003eWhen a resource has an \u003ccode\u003eaccess_type :runtime\u003c/code\u003e read policy (a check evaluated per record rather than compiled to a filter), \u003ccode\u003eAsh.Policy.Authorizer\u003c/code\u003e decides each record in \u003ccode\u003echeck_result/1\u003c/code\u003e (\u003ccode\u003elib/ash/policy/authorizer/authorizer.ex\u003c/code\u003e) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record (\u003ccode\u003e{[record | data], authorizer, any_forbidden?}\u003c/code\u003e) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\u003c/p\u003e\\n\u003cp\u003eThis issue affects ash: from 3.4.44 before 3.32.2.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.\\n\\nWhen a resource has an `access_type :runtime` read policy (a check evaluated per record rather than compiled to a filter), `Ash.Policy.Authorizer` decides each record in `check_result/1` (`lib/ash/policy/authorizer/authorizer.ex`) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record (`{[record | data], authorizer, any_forbidden?}`) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.\\n\\nThis issue affects ash: from 3.4.44 before 3.32.2.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.32.2\", \"versionStartIncluding\": \"3.4.44\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-09-01T04:14:57.840Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-82747\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T12:36:50.341Z\", \"dateReserved\": \"2026-08-31T01:00:09.774Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-09-01T04:14:57.840Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…