Uncontrolled Resource Consumption vulnerability in ash-project ash lets an attacker exhaust node memory by matching a filter that spans multiple to-many relationships in memory.
Ash.Filter.Runtime matches a filter against an in-memory record by first expanding the record into combinations of its related rows. flatten_relationships/2 (lib/ash/filter/runtime.ex) eagerly built the full Cartesian product across the filter's to-many relationship paths, so a record with K to-many relationships of M rows each materialized on the order of M^K scenarios before any predicate was checked. A filter or dataset that reaches several sizeable to-many relationships therefore allocates memory combinatorially and can exhaust the node. The fix streams the expansion lazily and short-circuits on the first matching scenario, bounding the work.
This issue affects ash: from 1.29.0-rc0 before 3.32.2.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82742.json",
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "1.29.0-rc0"
},
{
"fixed": "3.32.2"
},
{
"introduced": "f6f5d194bfc7802bd32e48bf2eabd2d97a0109a4"
},
{
"fixed": "da07f009e889819ec410fa1f0f12534bfb9e21dd"
}
]
},
{
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "1.29.0-rc0"
},
{
"fixed": "3.32.2"
}
]
},
{
"source": "DESCRIPTION",
"extracted_events": [
{
"introduced": "1.29.0-rc0"
},
{
"fixed": "3.32.2"
}
]
}
],
"cna_assigner": "EEF",
"cwe_ids": [
"CWE-400"
]
}