{
    "id": "CVE-2021-3918",
    "published": "2021-11-13 09:15:06",
    "last_modified": "2026-06-17 04:05:59",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-1321",
    "description": "json-schema is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
    "epss_score": "0.03830",
    "epss_percentile": "0.89815",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-08 18:17:28",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "json-schema_project",
            "product": "json-schema"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://github.com/kriszyp/json-schema/commit/22f146111f541d9737e832823699ad3528ca7741",
        "https://huntr.dev/bounties/bb6ccd63-f505-4e3a-b55f-cd2662c261a9",
        "https://lists.debian.org/debian-lts-announce/2022/12/msg00013.html",
        "https://github.com/kriszyp/json-schema/commit/22f146111f541d9737e832823699ad3528ca7741",
        "https://huntr.dev/bounties/bb6ccd63-f505-4e3a-b55f-cd2662c261a9",
        "https://lists.debian.org/debian-lts-announce/2022/12/msg00013.html",
        "https://security.netapp.com/advisory/ntap-20250117-0004/"
    ]
}