CVE-2026-101028

Incorrect Authorization vulnerability in ash-project ash allows an actor to infer data in related records they cannot read via Ash.count/2, Ash.exists/2 and Ash.aggregate/3. Ash.Actions.Aggregate.run/4 (lib/ash/actions/aggregate.ex) applied only the root resource's read policy before running the aggregate query. The read path also applies each related resource's read policy to filter and sort references that cross a relationship, directly (for example comments.body) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through Ash.Query.filter_input/2, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. Ash.read/2 and its page counts are not affected. This issue affects ash: from 2.6.0 before 3.34.6.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-101028.html
https://github.com/ash-project/ash/commit/30eaf1c6e8524527b703e3c4bfeff7967ee0b37c
https://github.com/ash-project/ash/commit/80936187b27ee94f15cd875affd3141b5cb23185
https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p
https://osv.dev/vulnerability/EEF-CVE-2026-101028
https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p

Configurations

No configuration.

History

09 Oct 2026, 18:17

Type	Values Removed	Values Added
References	~~() https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p -~~	() https://github.com/ash-project/ash/security/advisories/GHSA-xj24-8f5c-pp5p -

09 Oct 2026, 07:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-09 07:17

Updated : 2026-10-09 18:17

NVD link : CVE-2026-101028

Mitre link : CVE-2026-101028

CVE.ORG link : CVE-2026-101028

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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The read path also applies each related resource's read policy to filter and sort references that cross a relationship, directly (for example comments.body) or through an aggregate over one, but the aggregate path skipped that step. A caller whose filter or sort reaches these functions, for example through Ash.Query.filter_input/2, an ash_lua script, or an AshAi tool offering count or exists results, can test conditions against related rows hidden from them and recover their existence and attribute values one query at a time. Ash.read/2 and its page counts are not affected.\n\nThis issue affects ash: from 2.6.0 before 3.34.6."}], "lastModified": "2026-10-09T18:17:01.197", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}