Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.
When a resource has an accesstype :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in checkresult/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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82747.json",
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "3.4.44"
},
{
"fixed": "3.32.2"
},
{
"introduced": "f4a8ff53fd3b974468d73685cd3fc842ef893de3"
},
{
"fixed": "6eddb8ab26e45023faf0c79ebd152bb40aefda02"
}
]
},
{
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "3.4.44"
},
{
"fixed": "3.32.2"
}
]
},
{
"source": "DESCRIPTION",
"extracted_events": [
{
"introduced": "3.4.44"
},
{
"fixed": "3.32.2"
}
]
}
],
"cna_assigner": "EEF",
"cwe_ids": [
"CWE-863"
]
}