Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/95457?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/95457?format=api", "vulnerability_id": "VCID-ps4g-f1q9-wqhm", "summary": "Knot Resolver before 5.6.0 enables attackers to consume its resources, launching amplification attacks and potentially causing a denial of service. Specifically, a single client query may lead to a hundred TCP connection attempts if a DNS server closes connections without providing a response.", "aliases": [ { "alias": "CVE-2023-26249" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/926351?format=api", "purl": "pkg:deb/debian/knot-resolver@5.6.0-1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.6.0-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1054844?format=api", "purl": "pkg:deb/debian/knot-resolver@5.6.0-1%2Bdeb12u1", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.6.0-1%252Bdeb12u1" }, { "url": "http://public2.vulnerablecode.io/api/packages/926340?format=api", "purl": "pkg:deb/debian/knot-resolver@5.6.0-1%2Bdeb12u1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.6.0-1%252Bdeb12u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/926344?format=api", "purl": "pkg:deb/debian/knot-resolver@5.7.5-1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.7.5-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/926343?format=api", "purl": "pkg:deb/debian/knot-resolver@6.2.0-2?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@6.2.0-2%3Fdistro=trixie" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/926342?format=api", "purl": "pkg:deb/debian/knot-resolver@5.3.1-1%2Bdeb11u1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-66sa-bc5p-jqde" }, { "vulnerability": "VCID-c7c5-awxv-j3de" }, { "vulnerability": "VCID-efrw-bm7j-6qgz" }, { "vulnerability": "VCID-ps4g-f1q9-wqhm" }, { "vulnerability": "VCID-vprj-j7u6-zbe7" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.3.1-1%252Bdeb11u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1051365?format=api", "purl": "pkg:deb/debian/knot-resolver@5.3.1-1%2Bdeb11u1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-66sa-bc5p-jqde" }, { "vulnerability": "VCID-c7c5-awxv-j3de" }, { "vulnerability": "VCID-efrw-bm7j-6qgz" }, { "vulnerability": "VCID-ps4g-f1q9-wqhm" }, { "vulnerability": "VCID-vprj-j7u6-zbe7" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/knot-resolver@5.3.1-1%252Bdeb11u1" } ], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2023-26249", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.60014", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59975", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59928", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59954", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59924", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59974", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59987", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.60008", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00389", "scoring_system": "epss", "scoring_elements": "0.59993", "published_at": "2026-04-12T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-26249" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26249", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26249" }, { "reference_url": "https://www.knot-resolver.cz/2023-01-26-knot-resolver-5.6.0.html", "reference_id": "2023-01-26-knot-resolver-5.6.0.html", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-03-14T18:32:21Z/" } ], "url": "https://www.knot-resolver.cz/2023-01-26-knot-resolver-5.6.0.html" } ], "weaknesses": [], "exploits": [], "severity_range_score": "7.5 - 7.5", "exploitability": "0.5", "weighted_severity": "3.8", "risk_score": 1.9, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-ps4g-f1q9-wqhm" }