{"id":"CVE-2021-4040","aliases":["GHSA-gf8c-j759-86mg"],"url":"https://o3.security/vulnerability/CVE-2021-4040","summary":"org.apache.activemq:artemis-core-client Vulnerable to Out-of-Bounds Write","details":"A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.","published":"2022-08-24T16:15:09.313Z","modified":"2026-07-08T05:57:20.115327274Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.activemq:artemis-core-client","fixedVersion":"2.19.1"}],"fix":{"url":"https://github.com/apache/activemq-artemis/pull/3871/commits","label":"apache/activemq-artemis#3871"},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2021-4040"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2028254"},{"type":"FIX","url":"https://github.com/apache/activemq-artemis/pull/3871/commits"},{"type":"FIX","url":"https://issues.apache.org/jira/browse/ARTEMIS-3593"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:57:20.115327274Z"}}