{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2.5.41"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "00b2e3dae56fa24ea750eb525cc4709b7e5bee85"
            },
            {
              "fixed": "025f711506850aadb69cde1b57e5e5d57628c87f"
            },
            {
              "fixed": "05aad418c57bb78e6b58a843d70d45de8f50db45"
            },
            {
              "fixed": "2cc26f38f3e85c594957899f09043d5193146607"
            },
            {
              "fixed": "3ff6bd9cfdab5d41b4667ea7298d88ffd6f3fcb8"
            },
            {
              "fixed": "57433015815e59db5a1f11536f90920952cf3fcd"
            },
            {
              "fixed": "58f637aaab4d133e72f1454ebb963191d96d3b78"
            },
            {
              "fixed": "634f1f87c295193486c08c2c7ba1fee8a7339baa"
            },
            {
              "fixed": "63aebc27a878233b9475c742985aaef909bc755b"
            },
            {
              "fixed": "7acf8220cafac58bcfb362da37aca512fe4bb396"
            },
            {
              "fixed": "8311427c2edd72a8341f0a65e1f11073d7ad9191"
            },
            {
              "fixed": "84bafe69f5d0ab7f811371c0801a613f271ebc0b"
            },
            {
              "fixed": "9341690e9b6dde7f0605edea5533e05ba7362e35"
            },
            {
              "fixed": "ab9619dfa6cb5210fd20fb3b0b57006e4fc93916"
            },
            {
              "fixed": "bc182d55dde5686a36ca2eb88fe6c2adabb9fad9"
            },
            {
              "fixed": "c80a3533b3d787f45f5185a4621cc0f05b0cf2e5"
            }
          ],
          "repo": "https://github.com/misp/misp",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CIRCL",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56422.json"
  },
  "details": "Multiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (id) and ownership/scope foreign keys (event_id, org_id, user_id, sharing_group_id, galaxy_cluster_uuid, organisation_uuid, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.\n\nIn affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user’s context.\n\nThe fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central CRUDComponent::edit() primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub’s patch for 7acf8220c describes this central issue as CRUDComponent::edit() copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save() to update an arbitrary row unless the loaded ID is re-pinned.",
  "id": "CVE-2026-56422",
  "modified": "2026-07-08T05:37:24.435765271Z",
  "published": "2026-06-22T11:43:02.690Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56422.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56422"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/00b2e3dae56fa24ea750eb525cc4709b7e5bee85"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/025f711506850aadb69cde1b57e5e5d57628c87f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/05aad418c57bb78e6b58a843d70d45de8f50db45"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/2cc26f38f3e85c594957899f09043d5193146607"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/3ff6bd9cfdab5d41b4667ea7298d88ffd6f3fcb8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/57433015815e59db5a1f11536f90920952cf3fcd"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/58f637aaab4d133e72f1454ebb963191d96d3b78"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/634f1f87c295193486c08c2c7ba1fee8a7339baa"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/63aebc27a878233b9475c742985aaef909bc755b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/7acf8220cafac58bcfb362da37aca512fe4bb396"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/8311427c2edd72a8341f0a65e1f11073d7ad9191"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/84bafe69f5d0ab7f811371c0801a613f271ebc0b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/9341690e9b6dde7f0605edea5533e05ba7362e35"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/ab9619dfa6cb5210fd20fb3b0b57006e4fc93916"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/bc182d55dde5686a36ca2eb88fe6c2adabb9fad9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/c80a3533b3d787f45f5185a4621cc0f05b0cf2e5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/misp/misp"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields"
}