CVE-2026-82749 - Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is unresolved, leaking scoped records

CVE-2026-82749 - Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is unresolved, leaking scoped records

https://cvefeed.io/rssfeed/latest.atom / Tue, 09/01/2026 - 07:29
CVE ID :CVE-2026-82749
Published : Sept. 1, 2026, 4:18 a.m. | 13 minutes ago
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.
Severity: 5.9 | MEDIUM
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