CVE-2026-82749
Received Received - Intake

Incorrect Authorization in Ash Framework Due to Unresolved Parent References

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: EEF

Description
Incorrect Authorization vulnerability in ash-project ash widens a relationship's parent(...) scoping filter to match unintended records when the referenced parent field cannot be resolved. Loading a relationship whose filter references parent(...) resolves that expression against the parent record. resolve_parent_in_filter/3 (lib/ash/actions/read/relationships.ex) resolved an unresolvable parent reference (for example when the referenced field was not selected on the source query) to nil rather than failing. A scoping predicate such as org_id == parent(org_id) then becomes an IS NULL match, and a guard like is_nil(parent(org_id)) or org_id == parent(org_id) activates its unrestricted branch, so the relationship returns records the scope was meant to exclude. The fix fails the read with an error when a parent(...) reference cannot be resolved, instead of defaulting to nil. This issue affects ash: from 3.13.2 before 3.32.2.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-82749
EUVD
EUVD-2026-68953

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ash-project ash From 3.13.2 (inc) to 3.32.2 (exc)
ash_project ash From 3.13.2 (inc) to 3.32.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

CVE-2026-82749 is an Incorrect Authorization vulnerability in the Ash framework. When a relationship filter uses parent(...) and the referenced parent field cannot be resolved, the system incorrectly defaults to nil instead of failing. This causes the filter to degrade into an IS NULL match, potentially leaking scoped records that should be excluded.

Detection Guidance

To detect this vulnerability, check if your Ash framework version is between 3.13.2 and 3.32.1. Run commands like: mix deps | grep ash or mix hex.info ash. If using Git, check commit history between 0ddff26 and e52dad2.

Impact Analysis

This vulnerability allows unauthorized access to other tenants' records when the referenced parent attribute is not selected during queries. Attackers can exploit it to bypass scoping filters and retrieve restricted data, leading to cross-tenant data exposure.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating compliance requirements for data protection such as GDPR and HIPAA. It may result in unauthorized access to sensitive personal or health information, leading to legal and regulatory penalties.

Mitigation Strategies

Upgrade Ash to version 3.32.2 or later immediately. If upgrading is not possible, review relationships using parent(...) in filters and ensure parent fields are always selected in queries. Remove no_attributes?: true from affected relationships.

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