{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/95457?format=json","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=json","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/926340?format=json","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/1054844?format=json","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/926344?format=json","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=json","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/1051365?format=json","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"},{"url":"http://public2.vulnerablecode.io/api/packages/926342?format=json","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"}],"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":"0.60097","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.60033","published_at":"2026-05-12T12:55:00Z"},{"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"},{"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":"0.60014","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.60021","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.60007","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.59978","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.59995","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.59983","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.59943","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.5999","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00389","scoring_system":"epss","scoring_elements":"0.60047","published_at":"2026-05-09T12:55:00Z"}],"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"}