TI-2026-57060 Aliases CVE-2026-82742

Ash.Filter.Runtime materializes a combinatorial cross-product over to-many relationships, exhausting memory

LOW 26CWE-400Published 2026-09-01 · Updated 2026-09-01

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0018 7th percentileScored 2026-11-07

Fix Fixed ash (ash-project): 3.32.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ash-project	ash	1.29.0-rc0 to before 3.32.2	3.32.2	Patch available	CNA

ash Vendorash-project Affected 1.29.0-rc0 to before 3.32.2 Fixed in 3.32.2 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ash-project:ash::::::::	—	—	—

cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

Fix · CNA ash (ash-project) Fixed in 3.32.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-01
ash-project ash 3.32.2
16 records Highest priority Priority MEDIUM 15 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-57067 Incorrect authorization in ash-project ashPriority MEDIUM 60
- TI-2026-57065 Ash.Policy.Authorizer returns records denied by a runtime read policy to any actorPriority MEDIUM 60
- TI-2026-57064 Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to forbidden recordsPriority MEDIUM 60
Show all 16 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-82742

References

Patch 1

https://github.com/ash-project/ash/commit/da07f009e889819ec410fa1f0f12534bfb9e21dd

Advisory 1

https://github.com/ash-project/ash/security/advisories/GHSA-mgwj-c69v-6f83

Other 2

TI-2026-56298 Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service CVSS 4.0HIGH 8.7
TI-2026-52572 Unbounded atom creation from client-supplied RPC field names in AshTypescript field formatter CVSS 4.0HIGH 8.7
TI-2026-57010 Path traversal in AshAdmin file uploads via unsanitized client filename CVSS 4.0HIGH 8.3
TI-2026-26840 Ash Framework: Ash.Type.Module.cast_input/2 atom exhaustion via unchecked Module.concat allows BEAM VM crash CVSS 4.0HIGH 8.2
TI-2026-54252 EEx template evaluation of prompt content in AshAi enables remote code execution CVSS 4.0HIGH 8.9
TI-2026-54208 Stored XSS in AshAdmin relationship typeahead via unescaped label_field content CVSS 4.0HIGH 8.4

See all 90 →

Sources

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