{"schema_version":1,"title":"Apache Software Foundation Log4j Core vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in Apache Software Foundation Log4j Core: 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-2026-34480, was published on 10 April 2026.","url":"https://junglewise.ai/threats/technologies/log4j-core","json_url":"https://junglewise.ai/threats/technologies/log4j-core.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/log4j-core","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":1,"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-2026-34480","cvss":7.5,"epss":0.0119,"slug":"cve-2026-34480-apache-log4j-core-invalid-xml-output-in-xmllayout","title":"Apache Log4j Core invalid XML output in XmlLayout","severity":"high","exploited":false,"published_at":"2026-04-10T16:16:31.463+00:00","url":"https://junglewise.ai/threats/cve-2026-34480-apache-log4j-core-invalid-xml-output-in-xmllayout"},{"cve":"CVE-2021-44832","cvss":6.6,"epss":0.9791,"slug":"cve-2021-44832-apache-log4j2-remote-code-execution-via-jdbc-appender-jndi","title":"Apache Log4j2 remote code execution via JDBC Appender JNDI injection","severity":"medium","exploited":false,"published_at":"2022-01-04T16:14:20+00:00","url":"https://junglewise.ai/threats/cve-2021-44832-apache-log4j2-remote-code-execution-via-jdbc-appender-jndi"},{"cve":"CVE-2020-9488","cvss":3.7,"epss":0.081,"slug":"cve-2020-9488-apache-log4j-improper-certificate-validation-in-smtp-appender","title":"Apache Log4j improper certificate validation in SMTP appender","severity":"low","exploited":false,"published_at":"2020-06-05T14:15:51+00:00","url":"https://junglewise.ai/threats/cve-2020-9488-apache-log4j-improper-certificate-validation-in-smtp-appender"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"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}],"related":[{"name":"Apache Software Foundation IoTDB","slug":"iotdb","vulnerabilities":13,"url":"https://junglewise.ai/threats/technologies/iotdb"},{"name":"Apache Software Foundation Apache CXF","slug":"cxf","vulnerabilities":10,"url":"https://junglewise.ai/threats/technologies/cxf"},{"name":"Apache Software Foundation ActiveMQ All","slug":"activemq-all","vulnerabilities":7,"url":"https://junglewise.ai/threats/technologies/activemq-all"},{"name":"Apache Software Foundation Answer","slug":"answer","vulnerabilities":7,"url":"https://junglewise.ai/threats/technologies/answer"},{"name":"Apache Software Foundation Dolphinscheduler","slug":"dolphinscheduler","vulnerabilities":6,"url":"https://junglewise.ai/threats/technologies/dolphinscheduler"},{"name":"Apache Software Foundation NimBLE","slug":"nimble","vulnerabilities":6,"url":"https://junglewise.ai/threats/technologies/nimble"},{"name":"Apache Software Foundation JSPWiki","slug":"jspwiki","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/jspwiki"},{"name":"Apache Software Foundation Apache Kvrocks","slug":"kvrocks","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/kvrocks"},{"name":"Apache Software Foundation NiFi","slug":"nifi","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/nifi"},{"name":"Apache Software Foundation Apache Wicket","slug":"wicket","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/wicket"},{"name":"Apache Software Foundation Gravitino","slug":"gravitino","vulnerabilities":4,"url":"https://junglewise.ai/threats/technologies/gravitino"},{"name":"Apache Software Foundation Syncope","slug":"syncope","vulnerabilities":4,"url":"https://junglewise.ai/threats/technologies/syncope"}],"technology":{"hub":true,"name":"Apache Software Foundation Log4j Core","slug":"log4j-core","vendor":{"name":"Apache Software Foundation","slug":"apache-software-foundation","url":"https://junglewise.ai/threats/vendors/apache-software-foundation"},"aliases":[],"category":"library","homepage":"https://logging.apache.org/log4j/2.x/","repo_url":"https://github.com/apache/logging-log4j2","description":"A Java-based logging utility that provides the core logging framework for the Log4j 2 project.","url":"https://junglewise.ai/threats/technologies/log4j-core"},"most_severe":[{"cve":"CVE-2026-34480","cvss":7.5,"epss":0.0119,"slug":"cve-2026-34480-apache-log4j-core-invalid-xml-output-in-xmllayout","title":"Apache Log4j Core invalid XML output in XmlLayout","severity":"high","exploited":false,"published_at":"2026-04-10T16:16:31.463+00:00","url":"https://junglewise.ai/threats/cve-2026-34480-apache-log4j-core-invalid-xml-output-in-xmllayout"},{"cve":"CVE-2021-44832","cvss":6.6,"epss":0.9791,"slug":"cve-2021-44832-apache-log4j2-remote-code-execution-via-jdbc-appender-jndi","title":"Apache Log4j2 remote code execution via JDBC Appender JNDI injection","severity":"medium","exploited":false,"published_at":"2022-01-04T16:14:20+00:00","url":"https://junglewise.ai/threats/cve-2021-44832-apache-log4j2-remote-code-execution-via-jdbc-appender-jndi"},{"cve":"CVE-2020-9488","cvss":3.7,"epss":0.081,"slug":"cve-2020-9488-apache-log4j-improper-certificate-validation-in-smtp-appender","title":"Apache Log4j improper certificate validation in SMTP appender","severity":"low","exploited":false,"published_at":"2020-06-05T14:15:51+00:00","url":"https://junglewise.ai/threats/cve-2020-9488-apache-log4j-improper-certificate-validation-in-smtp-appender"}],"generated_at":"2026-09-26T15:07:00.181821+00:00"}