MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields_CVE-2026-56422

{
    "lastseen": "",
    "description": "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\u2019s 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()\u00a0primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub\u2019s patch for 7acf8220c\u00a0describes this central issue as CRUDComponent::edit()\u00a0copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save()\u00a0to update an arbitrary row unless the loaded ID is re-pinned.",
    "published": "2026-06-22T11:43:02.690Z",
    "modified": "2026-06-22T11:43:02.690Z",
    "type": "cve",
    "title": "MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields",
    "source": "CIRCL",
    "references": "https://github.com/MISP/MISP/commit/7acf8220cafac58bcfb362da37aca512fe4bb396\nhttps://github.com/MISP/MISP/commit/bc182d55dde5686a36ca2eb88fe6c2adabb9fad9\nhttps://github.com/MISP/MISP/commit/58f637aaab4d133e72f1454ebb963191d96d3b78\nhttps://github.com/MISP/MISP/commit/05aad418c57bb78e6b58a843d70d45de8f50db45\nhttps://github.com/MISP/MISP/commit/63aebc27a878233b9475c742985aaef909bc755b\nhttps://github.com/MISP/MISP/commit/00b2e3dae56fa24ea750eb525cc4709b7e5bee85\nhttps://github.com/MISP/MISP/commit/634f1f87c295193486c08c2c7ba1fee8a7339baa\nhttps://github.com/MISP/MISP/commit/ab9619dfa6cb5210fd20fb3b0b57006e4fc93916\nhttps://github.com/MISP/MISP/commit/8311427c2edd72a8341f0a65e1f11073d7ad9191\nhttps://github.com/MISP/MISP/commit/c80a3533b3d787f45f5185a4621cc0f05b0cf2e5\nhttps://github.com/MISP/MISP/commit/025f711506850aadb69cde1b57e5e5d57628c87f\nhttps://github.com/MISP/MISP/commit/3ff6bd9cfdab5d41b4667ea7298d88ffd6f3fcb8\nhttps://github.com/MISP/MISP/commit/84bafe69f5d0ab7f811371c0801a613f271ebc0b\nhttps://github.com/MISP/MISP/commit/2cc26f38f3e85c594957899f09043d5193146607\nhttps://github.com/MISP/MISP/commit/57433015815e59db5a1f11536f90920952cf3fcd\nhttps://github.com/MISP/MISP/commit/9341690e9b6dde7f0605edea5533e05ba7362e35",
    "id": "CVE-2026-56422",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "misp misp 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "misp",
    "version": "0",
    "vendor": "misp",
    "ai_description": "AI processing failed - invalid JSON response",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}