Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/208653?format=api",
    "vulnerability_id": "VCID-5yu6-q5mc-vqc9",
    "summary": "libmysofa is vulnerable to Heap-based Buffer Overflow",
    "aliases": [
        {
            "alias": "CVE-2021-3756"
        }
    ],
    "fixed_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/54455?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.2.1~dfsg0-1?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.2.1~dfsg0-1%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/54397?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.3.1~dfsg0-1?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.3.1~dfsg0-1%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/1078148?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.3.1~dfsg0-1",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.3.1~dfsg0-1"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/54400?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.3.3%2Bdfsg-1?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.3.3%252Bdfsg-1%3Fdistro=trixie"
        }
    ],
    "affected_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/54399?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.2~dfsg0-1?distro=trixie",
            "is_vulnerable": true,
            "affected_by_vulnerabilities": [
                {
                    "vulnerability": "VCID-5yu6-q5mc-vqc9"
                }
            ],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.2~dfsg0-1%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/1078147?format=api",
            "purl": "pkg:deb/debian/libmysofa@1.2~dfsg0-1",
            "is_vulnerable": true,
            "affected_by_vulnerabilities": [
                {
                    "vulnerability": "VCID-5yu6-q5mc-vqc9"
                }
            ],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/libmysofa@1.2~dfsg0-1"
        }
    ],
    "references": [
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-3756",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.00328",
                    "scoring_system": "epss",
                    "scoring_elements": "0.56192",
                    "published_at": "2026-06-11T12:55:00Z"
                },
                {
                    "value": "0.00328",
                    "scoring_system": "epss",
                    "scoring_elements": "0.56311",
                    "published_at": "2026-06-12T12:55:00Z"
                },
                {
                    "value": "0.00328",
                    "scoring_system": "epss",
                    "scoring_elements": "0.56326",
                    "published_at": "2026-06-13T12:55:00Z"
                },
                {
                    "value": "0.00328",
                    "scoring_system": "epss",
                    "scoring_elements": "0.56315",
                    "published_at": "2026-06-14T12:55:00Z"
                }
            ],
            "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-3756"
        },
        {
            "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3756",
            "reference_id": "",
            "reference_type": "",
            "scores": [],
            "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3756"
        },
        {
            "reference_url": "https://usn.ubuntu.com/USN-5184-1/",
            "reference_id": "USN-USN-5184-1",
            "reference_type": "",
            "scores": [],
            "url": "https://usn.ubuntu.com/USN-5184-1/"
        }
    ],
    "weaknesses": [],
    "exploits": [],
    "severity_range_score": null,
    "exploitability": "0.5",
    "weighted_severity": "0.0",
    "risk_score": null,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-5yu6-q5mc-vqc9"
}