{"id":"CVE-2026-80223","summary":"Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read","details":"Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant's records over GraphQL subscriptions.\n\nThe subscription resolver in AshGraphql.Graphql.Resolver authorizes each notification payload in memory: its fast path calls Ash.can/3 with run_queries?: false, which evaluates the read policy filter against the in-memory record via Ash.Expr.eval/2 and never issues a query. Ash applies multitenancy at query-build and data-layer-prefix time, not inside query.filter, so the evaluated policy carries no tenant condition and a tenant-B notification routed to a tenant-A subscriber is emitted whenever the policy filter is true. The single-notification clause has no tenant guard at all, and the batched clause checks only the head of the notification list, so non-head entries authorize purely in memory. A tenant-scoped read is reached only when filter evaluation fails.\n\nThis issue affects ash_graphql: from 1.4.0 before 1.11.0.","aliases":["EEF-CVE-2026-80223","GHSA-rcqc-59g2-gjg2"],"modified":"2026-09-02T03:30:21.799357701Z","published":"2026-08-30T18:27:09.440Z","database_specific":{"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80223.json","unresolved_ranges":[{"extracted_events":[{"introduced":"4c377e541a2adb6befc651f3dccc6a797bc58ba9"},{"fixed":"6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"EEF"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-80223.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-80223"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80223.json"},{"type":"ADVISORY","url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80223"},{"type":"FIX","url":"https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e"},{"type":"PACKAGE","url":"https://github.com/ash-project/ash_graphql"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ash-project/ash_graphql","events":[{"introduced":"cb2296922d48705a7bbabd92daa1ec240cab1e66"},{"fixed":"4e2c5476ecfd2c701488627ee46e6eefc58c982e"},{"fixed":"6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e"}],"database_specific":{"extracted_events":[{"introduced":"1.4.0"},{"fixed":"1.11.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v1.10.1","v1.10.0","v1.9.4","v1.9.3","v1.9.2","v1.9.1","v1.9.0","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.17","v1.7.16","v1.7.15","v1.7.14","v1.7.13","v1.7.12","v1.7.11","v1.7.10","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.0","v1.5.1","v1.5.0","v1.4.7","v1.4.6","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80223.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}