{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.2.17"
              },
              {
                "fixed": "2.3.25"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c7e220099edd5e10f7ad8fef6387169b2551f96f"
            },
            {
              "fixed": "1e38e7dc8838426cc94656238d9208759c661c03"
            },
            {
              "fixed": "0c1775c3cf8988f9abd10a8f92315afc5f06f16d"
            }
          ],
          "repo": "https://github.com/ash-project/ash_phoenix",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5xf4-hgcq-xw7v"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-209"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82727.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "a3436fcc321e3b34c242cceaf62c3c92bc1a452b"
          },
          {
            "fixed": "0c1775c3cf8988f9abd10a8f92315afc5f06f16d"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_phoenix writes the entire raw submitted param map into an exception message, so secrets submitted alongside a union form field leak into logs, crash reports and the dev error page.\n\nWhen AshPhoenix.Form.Auto builds a union sub-form and the submitted _union_type does not match a configured type, both raise sites built the message with inspect(params, pretty: true), embedding the full untrusted param map, and also inspected the internal union constraints[:types]. Because the message is constructed by the library rather than Phoenix's parameter logger, config :phoenix, :filter_parameters never redacts it. An attacker controls both the trigger and the contents: submitting %{\"_union_type\" =\u003e \"nope\", \"password\" =\u003e \"...\"} puts the password verbatim in the raised message. The fix reports only the offending _union_type and the valid type names, dropping the param and constraints dumps.\n\nThis issue affects ash_phoenix: from 1.2.17 before 2.3.25.",
  "id": "CVE-2026-82727",
  "modified": "2026-09-02T03:30:23.412821446Z",
  "published": "2026-08-31T03:03:58.982Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82727.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82727"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82727.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash_phoenix/security/advisories/GHSA-5xf4-hgcq-xw7v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82727"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash_phoenix/commit/0c1775c3cf8988f9abd10a8f92315afc5f06f16d"
    },
    {
      "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:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AshPhoenix Form.Auto leaks submitted params in an unknown _union_type error message"
}