{"id":"CVE-2026-80223","state":"PUBLISHED","title":"Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read","description":"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.","publishedAt":"2026-08-30T18:27:09.440Z","updatedAt":"2026-08-31T15:58:00.640Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"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","source":"EEF"},"assigner":"EEF","products":["ash-project ash_graphql"],"affected":[{"vendor":"ash-project","product":"ash_graphql","packageName":"ash_graphql","packageURL":"pkg:hex/ash_graphql","defaultStatus":"unaffected","versions":[{"version":"1.4.0","status":"affected","lessThan":"1.11.0","versionType":"semver"}],"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshGraphql.Graphql.Resolver'"],"programFiles":["lib/graphql/resolver.ex"],"programRoutines":[{"name":"'Elixir.AshGraphql.Graphql.Resolver':resolve/2"}],"repo":"https://github.com/ash-project/ash_graphql"},{"vendor":"ash-project","product":"ash_graphql","packageName":"ash-project/ash_graphql","packageURL":"pkg:github/ash-project/ash_graphql","defaultStatus":"unaffected","versions":[{"version":"4c377e541a2adb6befc651f3dccc6a797bc58ba9","status":"affected","lessThan":"6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e","versionType":"git"}],"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshGraphql.Graphql.Resolver'"],"programFiles":["lib/graphql/resolver.ex"],"programRoutines":[{"name":"'Elixir.AshGraphql.Graphql.Resolver':resolve/2"}],"repo":"https://github.com/ash-project/ash_graphql"}],"references":["https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2","https://cna.erlef.org/cves/CVE-2026-80223.html","https://osv.dev/vulnerability/EEF-CVE-2026-80223","https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80223.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80223","state":"PUBLISHED","datePublished":"2026-08-30T18:27:09.440Z","dateUpdated":"2026-08-31T15:58:00.640Z","assignerShortName":"EEF","assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","dateReserved":"2026-08-30T15:30:02.097Z"},"containers":{"cna":{"title":"Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"ash-project","product":"ash_graphql","packageName":"ash_graphql","packageURL":"pkg:hex/ash_graphql","defaultStatus":"unaffected","versions":[{"version":"1.4.0","status":"affected","lessThan":"1.11.0","versionType":"semver"}],"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshGraphql.Graphql.Resolver'"],"programFiles":["lib/graphql/resolver.ex"],"programRoutines":[{"name":"'Elixir.AshGraphql.Graphql.Resolver':resolve/2"}],"repo":"https://github.com/ash-project/ash_graphql"},{"vendor":"ash-project","product":"ash_graphql","packageName":"ash-project/ash_graphql","packageURL":"pkg:github/ash-project/ash_graphql","defaultStatus":"unaffected","versions":[{"version":"4c377e541a2adb6befc651f3dccc6a797bc58ba9","status":"affected","lessThan":"6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e","versionType":"git"}],"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshGraphql.Graphql.Resolver'"],"programFiles":["lib/graphql/resolver.ex"],"programRoutines":[{"name":"'Elixir.AshGraphql.Graphql.Resolver':resolve/2"}],"repo":"https://github.com/ash-project/ash_graphql"}],"references":[{"url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2","tags":["vendor-advisory","related"]},{"url":"https://cna.erlef.org/cves/CVE-2026-80223.html","tags":["related"]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-80223","tags":["related"]},{"url":"https://github.com/ash-project/ash_graphql/commit/6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e","tags":["patch"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","description":"CWE-863 Incorrect Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"EEF","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","dateUpdated":"2026-08-30T18:27:09.440Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>The application exposes <code>ash_graphql</code> subscriptions on a multitenant resource whose read policy passes on in-memory filter evaluation alone, and where a notification created in one tenant can reach a subscriber scoped to another tenant.</p>"},{"base64":false,"type":"text/markdown","value":"The application exposes `ash_graphql` subscriptions on a multitenant resource whose read policy passes on in-memory filter evaluation alone, and where a notification created in one tenant can reach a subscriber scoped to another tenant."}],"value":"The application exposes ash_graphql subscriptions on a multitenant resource whose read policy passes on in-memory filter evaluation alone, and where a notification created in one tenant can reach a subscriber scoped to another tenant."}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*","versionEndExcluding":"1.11.0","versionStartIncluding":"1.4.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"reporter","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"Zach Daniel / Ash Project"},{"lang":"en","type":"coordinator","value":"Jonatan Männchen / EEF"}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}],"source":{"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-rcqc-59g2-gjg2","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T15:57:36.488596Z","id":"CVE-2026-80223","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-31T15:58:00.640Z"}}]}}}