{"id":"CVE-2026-80223","aliases":["EEF-CVE-2026-80223","GHSA-rcqc-59g2-gjg2"],"url":"https://o3.security/vulnerability/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.","published":"2026-08-30T18:27:09.440Z","modified":"2026-09-01T03:46:05.192385901Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e","label":"ash-project/ash_graphql@6e30b8b"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T03:46:05.192385901Z"}}