Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/63243?format=api",
    "vulnerability_id": "VCID-p4kh-nd6b-jubh",
    "summary": "When drawing text onto a canvas with WebRender disabled, an out of bounds read could occur. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*",
    "aliases": [
        {
            "alias": "CVE-2021-29968"
        }
    ],
    "fixed_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/373687?format=api",
            "purl": "pkg:alpm/archlinux/firefox@89.0.1-1",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:alpm/archlinux/firefox@89.0.1-1"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/582227?format=api",
            "purl": "pkg:deb/debian/firefox@0?distro=sid",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@0%3Fdistro=sid"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/582059?format=api",
            "purl": "pkg:deb/debian/firefox@149.0-1?distro=sid",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0-1%3Fdistro=sid"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/1059611?format=api",
            "purl": "pkg:deb/debian/firefox@149.0.2-1?distro=sid",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0.2-1%3Fdistro=sid"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/1076056?format=api",
            "purl": "pkg:deb/debian/firefox@150.0-1?distro=sid",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@150.0-1%3Fdistro=sid"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/86330?format=api",
            "purl": "pkg:mozilla/Firefox@89.0.1",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:mozilla/Firefox@89.0.1"
        }
    ],
    "affected_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/372051?format=api",
            "purl": "pkg:alpm/archlinux/firefox@89.0-1",
            "is_vulnerable": true,
            "affected_by_vulnerabilities": [
                {
                    "vulnerability": "VCID-p4kh-nd6b-jubh"
                }
            ],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:alpm/archlinux/firefox@89.0-1"
        }
    ],
    "references": [
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29968",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.5289",
                    "published_at": "2026-04-26T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.528",
                    "published_at": "2026-04-01T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.5291",
                    "published_at": "2026-04-21T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52879",
                    "published_at": "2026-04-24T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52824",
                    "published_at": "2026-04-02T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.5285",
                    "published_at": "2026-04-04T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52819",
                    "published_at": "2026-04-07T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.5287",
                    "published_at": "2026-04-08T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52864",
                    "published_at": "2026-04-09T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52914",
                    "published_at": "2026-04-11T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52898",
                    "published_at": "2026-04-12T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52883",
                    "published_at": "2026-04-13T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.5292",
                    "published_at": "2026-04-16T12:55:00Z"
                },
                {
                    "value": "0.00296",
                    "scoring_system": "epss",
                    "scoring_elements": "0.52927",
                    "published_at": "2026-04-18T12:55:00Z"
                }
            ],
            "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29968"
        },
        {
            "reference_url": "https://security.archlinux.org/AVG-2074",
            "reference_id": "AVG-2074",
            "reference_type": "",
            "scores": [
                {
                    "value": "Medium",
                    "scoring_system": "archlinux",
                    "scoring_elements": ""
                }
            ],
            "url": "https://security.archlinux.org/AVG-2074"
        },
        {
            "reference_url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-27",
            "reference_id": "mfsa2021-27",
            "reference_type": "",
            "scores": [
                {
                    "value": "none",
                    "scoring_system": "generic_textual",
                    "scoring_elements": ""
                }
            ],
            "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-27"
        }
    ],
    "weaknesses": [],
    "exploits": [],
    "severity_range_score": "4.0 - 6.9",
    "exploitability": "0.5",
    "weighted_severity": "6.2",
    "risk_score": 3.1,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-p4kh-nd6b-jubh"
}