{"schema_version":1,"title":"log4net (NuGet) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in log4net (NuGet): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-40021, was published on 10 April 2026.","url":"https://junglewise.ai/threats/technologies/nuget-log4net","json_url":"https://junglewise.ai/threats/technologies/nuget-log4net.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/nuget-log4net","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":0,"all_time":3,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":1},"latest":[{"cve":"CVE-2026-40021","cvss":5.3,"epss":0.0098,"slug":"cve-2026-40021-apache-log4net-log-suppression-in-xmllayout","title":"Apache Log4net log suppression in XmlLayout","severity":"medium","exploited":false,"published_at":"2026-04-10T16:16:32.42+00:00","url":"https://junglewise.ai/threats/cve-2026-40021-apache-log4net-log-suppression-in-xmllayout"},{"cve":"CVE-2006-0743","epss":0.0637,"slug":"cve-2006-0743-apache-log4net-format-string-vulnerability-causes-dos","title":"Apache log4net format string vulnerability causes DoS","severity":"info","exploited":false,"published_at":"2022-05-01T06:42:27+00:00","url":"https://junglewise.ai/threats/cve-2006-0743-apache-log4net-format-string-vulnerability-causes-dos"},{"cve":"CVE-2018-1285","cvss":3.1,"epss":0.1737,"slug":"cve-2018-1285-xml-external-entity-attack-in-log4net","title":"XML External Entity attack in log4net","severity":"low","exploited":false,"published_at":"2021-01-29T19:47:23+00:00","url":"https://junglewise.ai/threats/cve-2018-1285-xml-external-entity-attack-in-log4net"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Microsoft.ChakraCore (NuGet)","slug":"microsoft-chakracore","vulnerabilities":247,"url":"https://junglewise.ai/threats/technologies/microsoft-chakracore"},{"name":"Magick.NET-Q16-AnyCPU (NuGet)","slug":"magick-net-q16-anycpu","vulnerabilities":186,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-anycpu"},{"name":"Magick.NET-Q16-HDRI-AnyCPU (NuGet)","slug":"magick-net-q16-hdri-anycpu","vulnerabilities":179,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-hdri-anycpu"},{"name":"Magick.NET-Q8-AnyCPU (NuGet)","slug":"magick-net-q8-anycpu","vulnerabilities":179,"url":"https://junglewise.ai/threats/technologies/magick-net-q8-anycpu"},{"name":"Magick.NET-Q16-HDRI-x86 (NuGet)","slug":"magick-net-q16-hdri-x86","vulnerabilities":178,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x86"},{"name":"Magick.NET-Q16-x86 (NuGet)","slug":"magick-net-q16-x86","vulnerabilities":178,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-x86"},{"name":"Magick.NET-Q8-x86 (NuGet)","slug":"magick-net-q8-x86","vulnerabilities":177,"url":"https://junglewise.ai/threats/technologies/magick-net-q8-x86"},{"name":"Magick.NET-Q16-OpenMP-x64 (NuGet)","slug":"magick-net-q16-openmp-x64","vulnerabilities":176,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x64"},{"name":"Magick.NET-Q16-arm64 (NuGet)","slug":"magick-net-q16-arm64","vulnerabilities":175,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-arm64"},{"name":"Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet)","slug":"magick-net-q16-hdri-openmp-arm64","vulnerabilities":175,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-arm64"},{"name":"Magick.NET-Q16-HDRI-x64 (NuGet)","slug":"magick-net-q16-hdri-x64","vulnerabilities":175,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x64"},{"name":"Magick.NET-Q16-OpenMP-arm64 (NuGet)","slug":"magick-net-q16-openmp-arm64","vulnerabilities":175,"url":"https://junglewise.ai/threats/technologies/magick-net-q16-openmp-arm64"}],"technology":{"hub":true,"name":"log4net (NuGet)","slug":"nuget-log4net","vendor":{"name":"NuGet","slug":"nuget","url":"https://junglewise.ai/threats/vendors/nuget"},"aliases":[],"url":"https://junglewise.ai/threats/technologies/nuget-log4net"},"most_severe":[{"cve":"CVE-2026-40021","cvss":5.3,"epss":0.0098,"slug":"cve-2026-40021-apache-log4net-log-suppression-in-xmllayout","title":"Apache Log4net log suppression in XmlLayout","severity":"medium","exploited":false,"published_at":"2026-04-10T16:16:32.42+00:00","url":"https://junglewise.ai/threats/cve-2026-40021-apache-log4net-log-suppression-in-xmllayout"},{"cve":"CVE-2018-1285","cvss":3.1,"epss":0.1737,"slug":"cve-2018-1285-xml-external-entity-attack-in-log4net","title":"XML External Entity attack in log4net","severity":"low","exploited":false,"published_at":"2021-01-29T19:47:23+00:00","url":"https://junglewise.ai/threats/cve-2018-1285-xml-external-entity-attack-in-log4net"},{"cve":"CVE-2006-0743","epss":0.0637,"slug":"cve-2006-0743-apache-log4net-format-string-vulnerability-causes-dos","title":"Apache log4net format string vulnerability causes DoS","severity":"info","exploited":false,"published_at":"2022-05-01T06:42:27+00:00","url":"https://junglewise.ai/threats/cve-2006-0743-apache-log4net-format-string-vulnerability-causes-dos"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}