CVE-2026-77454

Description

Incorrect Authorization vulnerability in ash-project ash_sql allows a caller to bypass a scoping or authorization filter expressed as exists/2 over a relationship that declares both a limit (or from_many?) and a parent(...)-referencing filter or sort. AshSql.Join.related_query/3 skips the caller-supplied exists predicate for such relationships and delegates it to limit_from_many/5. When the relationship's own filter or sort references parent(...), limit_from_many/5 takes a branch that drops both the limit and the predicate, emitting a bare correlated EXISTS with no predicate. The check then matches any record that has any related row. Most severely, when the expression backs a policy (for example authorize_if expr(exists(memberships, user_id == ^actor(:id)))), the actor-scoping condition disappears and the policy passes for any actor with any related row. This issue affects ash_sql: from 0.4.1 before 0.7.1.

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Produits concernés

• ash-project ash_sql

Scores CVSS

Faiblesses (CWE)

• CWE-863

Références

• https://cna.erlef.org/cves/CVE-2026-77454.html
• https://github.com/ash-project/ash_sql/commit/865fdd4e5e70724a23b19c048e6768c31d2209ab
• https://github.com/ash-project/ash_sql/security/advisories/GHSA-8v9m-8pxv-738c
• https://osv.dev/vulnerability/EEF-CVE-2026-77454
• https://github.com/ash-project/ash_sql/security/advisories/GHSA-8v9m-8pxv-738c

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories