{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ash-project:ash_phoenix:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.AshPhoenix.LiveView.SubdomainHook'"],"packageName":"ash_phoenix","packageURL":"pkg:hex/ash_phoenix","product":"ash_phoenix","programFiles":["lib/ash_phoenix/live_view/subdomain_hook.ex"],"programRoutines":[{"name":"'Elixir.AshPhoenix.LiveView.SubdomainHook':on_mount/4"}],"repo":"https://github.com/ash-project/ash_phoenix","vendor":"ash-project","versions":[{"lessThan":"2.3.25","status":"affected","version":"2.1.26","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ash-project:ash_phoenix:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.AshPhoenix.LiveView.SubdomainHook'"],"packageName":"ash-project/ash_phoenix","packageURL":"pkg:github/ash-project/ash_phoenix","product":"ash_phoenix","programFiles":["lib/ash_phoenix/live_view/subdomain_hook.ex"],"programRoutines":[{"name":"'Elixir.AshPhoenix.LiveView.SubdomainHook':on_mount/4"}],"repo":"https://github.com/ash-project/ash_phoenix","vendor":"ash-project","versions":[{"lessThan":"b396e1aa5c6bdec39255f19cf938b539e6d28b71","status":"affected","version":"9a5ea4d377bc263de321d79574872a3dfc4fb541","versionType":"git"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>The application uses <code>AshPhoenix.LiveView.SubdomainHook</code> with a <code>handle_subdomain</code> callback as a tenant-scoped authorization gate.</p>"},{"base64":false,"type":"text/markdown","value":"The application uses `AshPhoenix.LiveView.SubdomainHook` with a `handle_subdomain` callback as a tenant-scoped authorization gate."}],"value":"The application uses AshPhoenix.LiveView.SubdomainHook with a handle_subdomain callback as a tenant-scoped authorization gate."}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:ash-project:ash_phoenix:*:*:*:*:*:*:*:*","versionEndExcluding":"2.3.25","versionStartIncluding":"2.1.26","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"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Incorrect Authorization vulnerability in ash-project ash_phoenix invokes the <code>SubdomainHook</code> authorization callback with a <code>nil</code> tenant, so tenant-scoped access checks never see the tenant they are meant to enforce.</p>\n<p><code>AshPhoenix.LiveView.SubdomainHook.on_mount/4</code> attached a <code>handle_params</code> hook to assign the tenant and then immediately called <code>handle_subdomain</code> in the same <code>on_mount</code>. The tenant assign is only written when LiveView later runs <code>handle_params</code>, strictly after <code>on_mount</code> returns, so <code>handle_subdomain</code> read an unset assign and ran as <code>apply(m, f, [socket, nil | a])</code>. A consumer gate that halts when the user does not belong to the tenant instead evaluated <code>nil</code>, either crashing or taking a permissive branch, and it was never re-run once the real subdomain was assigned or on later navigations. The fix runs <code>handle_subdomain</code> inside the <code>handle_params</code> hook with the real tenant on every navigation.</p>\n<p>This issue affects ash_phoenix: from 2.1.26 before 2.3.25.</p>"},{"base64":false,"type":"text/markdown","value":"Incorrect Authorization vulnerability in ash-project ash_phoenix invokes the `SubdomainHook` authorization callback with a `nil` tenant, so tenant-scoped access checks never see the tenant they are meant to enforce.\n\n`AshPhoenix.LiveView.SubdomainHook.on_mount/4` attached a `handle_params` hook to assign the tenant and then immediately called `handle_subdomain` in the same `on_mount`. The tenant assign is only written when LiveView later runs `handle_params`, strictly after `on_mount` returns, so `handle_subdomain` read an unset assign and ran as `apply(m, f, [socket, nil | a])`. A consumer gate that halts when the user does not belong to the tenant instead evaluated `nil`, either crashing or taking a permissive branch, and it was never re-run once the real subdomain was assigned or on later navigations. The fix runs `handle_subdomain` inside the `handle_params` hook with the real tenant on every navigation.\n\nThis issue affects ash_phoenix: from 2.1.26 before 2.3.25."}],"value":"Incorrect Authorization vulnerability in ash-project ash_phoenix invokes the SubdomainHook authorization callback with a nil tenant, so tenant-scoped access checks never see the tenant they are meant to enforce.\n\nAshPhoenix.LiveView.SubdomainHook.on_mount/4 attached a handle_params hook to assign the tenant and then immediately called handle_subdomain in the same on_mount. The tenant assign is only written when LiveView later runs handle_params, strictly after on_mount returns, so handle_subdomain read an unset assign and ran as apply(m, f, [socket, nil | a]). A consumer gate that halts when the user does not belong to the tenant instead evaluated nil, either crashing or taking a permissive branch, and it was never re-run once the real subdomain was assigned or on later navigations. The fix runs handle_subdomain inside the handle_params hook with the real tenant on every navigation.\n\nThis issue affects ash_phoenix: from 2.1.26 before 2.3.25."}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.6,"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:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","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":{"dateUpdated":"2026-08-31T03:07:57.455Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/ash-project/ash_phoenix/security/advisories/GHSA-39c8-xcwr-gqff"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-82724.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-82724"},{"tags":["patch"],"url":"https://github.com/ash-project/ash_phoenix/commit/b396e1aa5c6bdec39255f19cf938b539e6d28b71"}],"source":{"discovery":"EXTERNAL"},"title":"Broken access control in AshPhoenix SubdomainHook via a nil tenant in handle_subdomain"}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-82724","datePublished":"2026-08-31T03:07:57.455Z","dateReserved":"2026-08-31T00:59:08.960Z","dateUpdated":"2026-08-31T03:07:57.455Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}