{"id":"CVE-2026-77454","summary":"exists/2 predicate silently dropped on limited relationships with a parent() filter in AshSql","details":"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.\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.","aliases":["EEF-CVE-2026-77454","GHSA-8v9m-8pxv-738c"],"modified":"2026-09-03T03:30:53.708105535Z","published":"2026-08-30T12:01:23.862Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"e26a63b29bd7501505fafd726f14262cdc3b6629"},{"fixed":"865fdd4e5e70724a23b19c048e6768c31d2209ab"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"EEF","cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77454.json"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-77454.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-77454"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77454.json"},{"type":"ADVISORY","url":"https://github.com/ash-project/ash_sql/security/advisories/GHSA-8v9m-8pxv-738c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77454"},{"type":"FIX","url":"https://github.com/ash-project/ash_sql/commit/865fdd4e5e70724a23b19c048e6768c31d2209ab"},{"type":"PACKAGE","url":"https://github.com/ash-project/ash_sql"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ash-project/ash_sql","events":[{"introduced":"24e3c61e63258bfd9592ccc5a51a3d7148699914"},{"fixed":"cfe94c67484270db0f46384bd35cf1fbad8793d5"},{"fixed":"865fdd4e5e70724a23b19c048e6768c31d2209ab"}],"database_specific":{"extracted_events":[{"introduced":"0.4.1"},{"fixed":"0.7.1"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v0.7.0","v0.6.9","v0.6.8","v0.6.7","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77454.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}