Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/87965?format=api",
    "vulnerability_id": "VCID-mtmk-9yt6-s3gv",
    "summary": "ruby: Heap-based buffer overflow in the rb_str_justify() function",
    "aliases": [
        {
            "alias": "CVE-2009-4124"
        },
        {
            "alias": "GHSA-9mvm-2xp2-9wmw"
        },
        {
            "alias": "OSV-60880"
        }
    ],
    "fixed_packages": [],
    "affected_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/130673?format=api",
            "purl": "pkg:ruby/ruby@1.9",
            "is_vulnerable": true,
            "affected_by_vulnerabilities": [
                {
                    "vulnerability": "VCID-5e5v-pmb2-zkba"
                },
                {
                    "vulnerability": "VCID-e58n-x5ra-6ybq"
                },
                {
                    "vulnerability": "VCID-ggcn-qfts-rbeu"
                },
                {
                    "vulnerability": "VCID-m6vt-b9kt-93hw"
                },
                {
                    "vulnerability": "VCID-mtmk-9yt6-s3gv"
                }
            ],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:ruby/ruby@1.9"
        }
    ],
    "references": [
        {
            "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2009-4124.json",
            "reference_id": "",
            "reference_type": "",
            "scores": [],
            "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2009-4124.json"
        },
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2009-4124",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.01853",
                    "scoring_system": "epss",
                    "scoring_elements": "0.8311",
                    "published_at": "2026-05-05T12:55:00Z"
                },
                {
                    "value": "0.01853",
                    "scoring_system": "epss",
                    "scoring_elements": "0.8313",
                    "published_at": "2026-05-07T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83362",
                    "published_at": "2026-04-04T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83361",
                    "published_at": "2026-04-07T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83385",
                    "published_at": "2026-04-08T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83394",
                    "published_at": "2026-04-09T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83409",
                    "published_at": "2026-04-11T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83404",
                    "published_at": "2026-04-12T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83332",
                    "published_at": "2026-04-01T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83435",
                    "published_at": "2026-04-16T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83436",
                    "published_at": "2026-04-21T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83459",
                    "published_at": "2026-04-24T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83466",
                    "published_at": "2026-04-26T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83468",
                    "published_at": "2026-04-29T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83399",
                    "published_at": "2026-04-13T12:55:00Z"
                },
                {
                    "value": "0.01934",
                    "scoring_system": "epss",
                    "scoring_elements": "0.83347",
                    "published_at": "2026-04-02T12:55:00Z"
                }
            ],
            "url": "https://api.first.org/data/v1/epss?cve=CVE-2009-4124"
        },
        {
            "reference_url": "https://www.ruby-lang.org/en/news/2009/12/07/heap-overflow-in-string",
            "reference_id": "",
            "reference_type": "",
            "scores": [],
            "url": "https://www.ruby-lang.org/en/news/2009/12/07/heap-overflow-in-string"
        },
        {
            "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=959916",
            "reference_id": "959916",
            "reference_type": "",
            "scores": [],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=959916"
        },
        {
            "reference_url": "https://usn.ubuntu.com/900-1/",
            "reference_id": "USN-900-1",
            "reference_type": "",
            "scores": [],
            "url": "https://usn.ubuntu.com/900-1/"
        }
    ],
    "weaknesses": [
        {
            "cwe_id": 122,
            "name": "Heap-based Buffer Overflow",
            "description": "A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc()."
        }
    ],
    "exploits": [],
    "severity_range_score": null,
    "exploitability": "0.5",
    "weighted_severity": "0.0",
    "risk_score": null,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-mtmk-9yt6-s3gv"
}