{"action":"Upgrade zeromq3 to 4.3.3-1 or later.","affected":[{"fixed":"4.3.3-1","introduced":"0"}],"component":"zeromq3","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["4.3.3-1"],"id":"tcs_01M5NFB1NPJPXMSG8TP53Y1BQX","modified_at":"2026-10-23T18:04:48.810412632Z","published_at":"2021-05-28T11:15:07.970Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-20237","https://security-tracker.debian.org/tracker/CVE-2021-20237"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-20237","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-20237"}],"summary":"An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages tha"}