{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.1.26"
              },
              {
                "fixed": "2.3.25"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "02277a84d03fb43bdcbbb63dd97f9f1727509d8f"
            },
            {
              "fixed": "1e38e7dc8838426cc94656238d9208759c661c03"
            },
            {
              "fixed": "b396e1aa5c6bdec39255f19cf938b539e6d28b71"
            }
          ],
          "repo": "https://github.com/ash-project/ash_phoenix",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-39c8-xcwr-gqff"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82724.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "9a5ea4d377bc263de321d79574872a3dfc4fb541"
          },
          {
            "fixed": "b396e1aa5c6bdec39255f19cf938b539e6d28b71"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2026-82724",
  "modified": "2026-09-03T03:30:55.128515054Z",
  "published": "2026-08-31T03:07:57.455Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82724.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82724"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82724.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash_phoenix/security/advisories/GHSA-39c8-xcwr-gqff"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82724"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash_phoenix/commit/b396e1aa5c6bdec39255f19cf938b539e6d28b71"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash_phoenix"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Broken access control in AshPhoenix SubdomainHook via a nil tenant in handle_subdomain"
}