{"affected":[{"package":{"ecosystem":"Hex","name":"ash_sql","purl":"pkg:hex/ash_sql"},"ranges":[{"events":[{"introduced":"0.4.1"},{"fixed":"0.7.1"}],"type":"SEMVER"}],"versions":["0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.6.0","0.6.1","0.6.2","0.6.3","0.6.4","0.6.5","0.6.6","0.6.7","0.6.8","0.6.9","0.7.0"]},{"ranges":[{"events":[{"introduced":"e26a63b29bd7501505fafd726f14262cdc3b6629"},{"fixed":"865fdd4e5e70724a23b19c048e6768c31d2209ab"}],"repo":"https://github.com/ash-project/ash_sql","type":"GIT"}]}],"aliases":["GHSA-8v9m-8pxv-738c","CVE-2026-77454"],"credits":[{"name":"Peter Ullrich","type":"FINDER"},{"name":"Peter Ullrich","type":"REPORTER"},{"name":"Zach Daniel / Ash Project","type":"REMEDIATION_DEVELOPER"},{"name":"Jonatan Männchen / EEF","type":"COORDINATOR"}],"database_specific":{"capec_ids":["CAPEC-1"],"cpe_ids":["cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-863"]},"details":"## Summary\n\nIncorrect 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.\n\nAshSql.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.\n\nThis issue affects ash\\_sql: from 0.4.1 before 0.7.1.\n\n## Configuration\n\nAn application must use exists/2 (in a filter or a policy) over a relationship that declares both a limit or from\\_many? and a filter or sort that references parent(...). The predicate supplied to exists/2 is the one that is dropped.","id":"EEF-CVE-2026-77454","modified":"2026-08-30T12:01:24.316622Z","published":"2026-08-30T12:01:23.862Z","references":[{"type":"ADVISORY","url":"https://github.com/ash-project/ash_sql/security/advisories/GHSA-8v9m-8pxv-738c"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-77454.html"},{"type":"FIX","url":"https://github.com/ash-project/ash_sql/commit/865fdd4e5e70724a23b19c048e6768c31d2209ab"},{"type":"PACKAGE","url":"https://hex.pm/packages/ash_sql"}],"related":[],"schema_version":"1.7.3","severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"}],"summary":"exists/2 predicate silently dropped on limited relationships with a parent() filter in AshSql","upstream":[]}