{
    "id": "CVE-2017-2491",
    "published": "2017-06-27 20:29:00",
    "last_modified": "2026-06-17 01:16:18",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "cwe": "CWE-416",
    "description": "Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to execute arbitrary code via a crafted web page, or a crafted file.",
    "epss_score": "0.08038",
    "epss_percentile": "0.94628",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-04 18:17:15",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "apple",
            "product": "iphone_os"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "41964",
            "title": "Apple Safari 10.0.3 - 'JSC::CachedCall' Use-After-Free",
            "date": "2017-05-04",
            "url": "https://www.exploit-db.com/exploits/41964"
        }
    ],
    "refs_list": [
        "http://www.securityfocus.com/bid/98316",
        "http://www.zerodayinitiative.com/advisories/ZDI-17-321",
        "https://support.apple.com/en-us/HT207617",
        "https://www.exploit-db.com/exploits/41964/",
        "http://www.securityfocus.com/bid/98316",
        "http://www.zerodayinitiative.com/advisories/ZDI-17-321",
        "https://support.apple.com/en-us/HT207617",
        "https://www.exploit-db.com/exploits/41964/"
    ]
}