{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/28515?format=json","vulnerability_id":"VCID-73r3-6fbf-kqcu","summary":"","aliases":[{"alias":"CVE-2026-40021"},{"alias":"GHSA-4f7c-pmjv-c25w"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/1078798?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-10","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-10"},{"url":"http://public2.vulnerablecode.io/api/packages/94088?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-10?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-10%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/373941?format=json","purl":"pkg:nuget/log4net@3.3.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.3.0"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/94087?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-8?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-8%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/1078796?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-8","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-8"},{"url":"http://public2.vulnerablecode.io/api/packages/94089?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-9?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-9%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/1078797?format=json","purl":"pkg:deb/debian/log4net@1.2.10%2Bdfsg-9","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/log4net@1.2.10%252Bdfsg-9"},{"url":"http://public2.vulnerablecode.io/api/packages/20410?format=json","purl":"pkg:nuget/log4net@1.2.10","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@1.2.10"},{"url":"http://public2.vulnerablecode.io/api/packages/459820?format=json","purl":"pkg:nuget/log4net@1.2.11","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@1.2.11"},{"url":"http://public2.vulnerablecode.io/api/packages/459821?format=json","purl":"pkg:nuget/log4net@2.0.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.0"},{"url":"http://public2.vulnerablecode.io/api/packages/459822?format=json","purl":"pkg:nuget/log4net@2.0.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.1"},{"url":"http://public2.vulnerablecode.io/api/packages/459823?format=json","purl":"pkg:nuget/log4net@2.0.2","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.2"},{"url":"http://public2.vulnerablecode.io/api/packages/459824?format=json","purl":"pkg:nuget/log4net@2.0.3","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.3"},{"url":"http://public2.vulnerablecode.io/api/packages/459825?format=json","purl":"pkg:nuget/log4net@2.0.4","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.4"},{"url":"http://public2.vulnerablecode.io/api/packages/459826?format=json","purl":"pkg:nuget/log4net@2.0.5","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.5"},{"url":"http://public2.vulnerablecode.io/api/packages/459827?format=json","purl":"pkg:nuget/log4net@2.0.6","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.6"},{"url":"http://public2.vulnerablecode.io/api/packages/459828?format=json","purl":"pkg:nuget/log4net@2.0.7","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.7"},{"url":"http://public2.vulnerablecode.io/api/packages/459829?format=json","purl":"pkg:nuget/log4net@2.0.8","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.8"},{"url":"http://public2.vulnerablecode.io/api/packages/459830?format=json","purl":"pkg:nuget/log4net@2.0.9","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-4gnc-g7jg-nkah"},{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.9"},{"url":"http://public2.vulnerablecode.io/api/packages/382714?format=json","purl":"pkg:nuget/log4net@2.0.10","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.10"},{"url":"http://public2.vulnerablecode.io/api/packages/1003496?format=json","purl":"pkg:nuget/log4net@2.0.11","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.11"},{"url":"http://public2.vulnerablecode.io/api/packages/1003497?format=json","purl":"pkg:nuget/log4net@2.0.12","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.12"},{"url":"http://public2.vulnerablecode.io/api/packages/1003498?format=json","purl":"pkg:nuget/log4net@2.0.13","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.13"},{"url":"http://public2.vulnerablecode.io/api/packages/1003499?format=json","purl":"pkg:nuget/log4net@2.0.14","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.14"},{"url":"http://public2.vulnerablecode.io/api/packages/1003500?format=json","purl":"pkg:nuget/log4net@2.0.15","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.15"},{"url":"http://public2.vulnerablecode.io/api/packages/1003501?format=json","purl":"pkg:nuget/log4net@2.0.16","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.16"},{"url":"http://public2.vulnerablecode.io/api/packages/1003502?format=json","purl":"pkg:nuget/log4net@2.0.17","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@2.0.17"},{"url":"http://public2.vulnerablecode.io/api/packages/1003503?format=json","purl":"pkg:nuget/log4net@3.0.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.0.0"},{"url":"http://public2.vulnerablecode.io/api/packages/1003504?format=json","purl":"pkg:nuget/log4net@3.0.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.0.1"},{"url":"http://public2.vulnerablecode.io/api/packages/1003505?format=json","purl":"pkg:nuget/log4net@3.0.2","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.0.2"},{"url":"http://public2.vulnerablecode.io/api/packages/1003506?format=json","purl":"pkg:nuget/log4net@3.0.3","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.0.3"},{"url":"http://public2.vulnerablecode.io/api/packages/1003507?format=json","purl":"pkg:nuget/log4net@3.0.4","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.0.4"},{"url":"http://public2.vulnerablecode.io/api/packages/1003508?format=json","purl":"pkg:nuget/log4net@3.1.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.1.0"},{"url":"http://public2.vulnerablecode.io/api/packages/1003509?format=json","purl":"pkg:nuget/log4net@3.2.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-73r3-6fbf-kqcu"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/log4net@3.2.0"}],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-40021","reference_id":"","reference_type":"","scores":[{"value":"0.00285","scoring_system":"epss","scoring_elements":"0.52347","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00285","scoring_system":"epss","scoring_elements":"0.52472","published_at":"2026-06-14T12:55:00Z"},{"value":"0.00285","scoring_system":"epss","scoring_elements":"0.52489","published_at":"2026-06-13T12:55:00Z"},{"value":"0.00285","scoring_system":"epss","scoring_elements":"0.52476","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-40021"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40021","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40021"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"3.7","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/apache/logging-log4net","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/logging-log4net"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40021","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40021"},{"reference_url":"http://www.openwall.com/lists/oss-security/2026/04/10/11","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"http://www.openwall.com/lists/oss-security/2026/04/10/11"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1133360","reference_id":"1133360","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1133360"},{"reference_url":"https://github.com/apache/logging-log4net/pull/280","reference_id":"280","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T17:32:06Z/"}],"url":"https://github.com/apache/logging-log4net/pull/280"},{"reference_url":"https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:log4net:*:*:*:*:*:*:*:*","reference_id":"cpe:2.3:a:apache:log4net:*:*:*:*:*:*:*:*","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:log4net:*:*:*:*:*:*:*:*"},{"reference_url":"https://github.com/advisories/GHSA-4f7c-pmjv-c25w","reference_id":"GHSA-4f7c-pmjv-c25w","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-4f7c-pmjv-c25w"},{"reference_url":"https://logging.apache.org/log4net/manual/configuration/layouts.html","reference_id":"layouts.html","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T17:32:06Z/"}],"url":"https://logging.apache.org/log4net/manual/configuration/layouts.html"},{"reference_url":"https://lists.apache.org/thread/q8otftjswhk69n3kxslqg7cobr0x4st7","reference_id":"q8otftjswhk69n3kxslqg7cobr0x4st7","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T17:32:06Z/"}],"url":"https://lists.apache.org/thread/q8otftjswhk69n3kxslqg7cobr0x4st7"},{"reference_url":"https://logging.apache.org/security.html#CVE-2026-40021","reference_id":"security.html#CVE-2026-40021","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T17:32:06Z/"}],"url":"https://logging.apache.org/security.html#CVE-2026-40021"},{"reference_url":"https://logging.apache.org/cyclonedx/vdr.xml","reference_id":"vdr.xml","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-10T17:32:06Z/"}],"url":"https://logging.apache.org/cyclonedx/vdr.xml"}],"weaknesses":[{"cwe_id":116,"name":"Improper Encoding or Escaping of Output","description":"The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved."},{"cwe_id":937,"name":"OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."},{"cwe_id":1035,"name":"OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."}],"exploits":[],"severity_range_score":"3.7 - 6.9","exploitability":"0.5","weighted_severity":"6.2","risk_score":3.1,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-73r3-6fbf-kqcu"}