{"id":"JLSEC-2026-514","details":"An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.","modified":"2026-05-20T04:15:03.611924618Z","published":"2026-05-20T04:02:19.667Z","upstream":["CVE-2021-20234"],"database_specific":{"sources":[{"modified":"2024-11-21T05:46:11.107Z","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20234","id":"CVE-2021-20234","database_specific":{"status":"Modified"},"published":"2021-04-01T14:15:13.123Z","imported":"2026-05-20T01:02:00.881Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-20234"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1921972"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1921972"},{"type":"WEB","url":"https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87"},{"type":"WEB","url":"https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87"}],"affected":[{"package":{"name":"ZeroMQ_jll","ecosystem":"Julia","purl":"pkg:julia/ZeroMQ_jll?uuid=8f1865be-045e-5c20-9c9f-bfbfb0764568"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.3.4+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-514.json"}}],"schema_version":"1.7.5"}