Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/80338?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/80338?format=api", "purl": "pkg:golang/gopkg.in/yaml.v2@2.2.3", "type": "golang", "namespace": "gopkg.in", "name": "yaml.v2", "version": "2.2.3", "qualifiers": {}, "subpath": "", "is_vulnerable": false, "next_non_vulnerable_version": "2.2.4", "latest_non_vulnerable_version": "2.2.8", "affected_by_vulnerabilities": [], "fixing_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/52638?format=api", "vulnerability_id": "VCID-k874-59fj-9fcg", "summary": "YAML Go package vulnerable to denial of service\nDue to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.", "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4235.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4235.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-4235", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00034", "scoring_system": "epss", "scoring_elements": "0.09811", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00034", "scoring_system": "epss", "scoring_elements": "0.09779", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00034", "scoring_system": "epss", "scoring_elements": "0.09766", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00036", "scoring_system": "epss", "scoring_elements": "0.1045", "published_at": "2026-05-05T12:55:00Z" }, { "value": "0.00036", "scoring_system": "epss", "scoring_elements": "0.10588", "published_at": "2026-05-07T12:55:00Z" }, { "value": "0.00036", "scoring_system": "epss", "scoring_elements": "0.10496", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16539", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16416", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16475", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16574", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16653", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16453", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16593", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16409", "published_at": "2026-04-01T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.1659", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16533", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16436", "published_at": "2026-04-18T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-4235" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4235", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4235" }, { "reference_url": "https://github.com/go-yaml/yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/go-yaml/yaml" }, { "reference_url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-11T16:24:34Z/" } ], "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241" }, { "reference_url": "https://github.com/go-yaml/yaml/pull/375", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-11T16:24:34Z/" } ], "url": "https://github.com/go-yaml/yaml/pull/375" }, { "reference_url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-11T16:24:34Z/" } ], "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4235", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4235" }, { "reference_url": "https://pkg.go.dev/vuln/GO-2021-0061", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-11T16:24:34Z/" } ], "url": "https://pkg.go.dev/vuln/GO-2021-0061" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=2156727", "reference_id": "2156727", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2156727" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2022:7398", "reference_id": "RHSA-2022:7398", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2022:7398" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2023:0569", "reference_id": "RHSA-2023:0569", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2023:0569" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2023:0570", "reference_id": "RHSA-2023:0570", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2023:0570" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2023:1326", "reference_id": "RHSA-2023:1326", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2023:1326" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2023:3615", "reference_id": "RHSA-2023:3615", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2023:3615" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2023:3742", "reference_id": "RHSA-2023:3742", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2023:3742" }, { "reference_url": "https://usn.ubuntu.com/6287-1/", "reference_id": "USN-6287-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/6287-1/" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/80338?format=api", "purl": "pkg:golang/gopkg.in/yaml.v2@2.2.3", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:golang/gopkg.in/yaml.v2@2.2.3" } ], "aliases": [ "CVE-2021-4235", "GHSA-r88r-gmrh-7j83" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-k874-59fj-9fcg" } ], "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/packages/pkg:golang/gopkg.in/yaml.v2@2.2.3" }