{"id":"UBUNTU-CVE-2026-10143","details":"kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in SCRAM authentication handling that allows a malicious or machine-in-the-middle broker to freeze the client event loop by supplying an excessively large iteration count. In scram.py, ScramClient.process_server_first_message() passes the broker-controlled SCRAM iteration count directly to hashlib.pbkdf2_hmac() without validation, blocking producer sends, consumer polls, admin operations, and heartbeats, which can cause consumer group eviction and repeated reconnect failures.","modified":"2026-06-30T18:15:59.773448277Z","published":"2026-06-10T22:16:00Z","upstream":["CVE-2026-10143"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10143"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-10143"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487722"}],"affected":[{"package":{"name":"python-kafka","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.3-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.3-2","binary_name":"python-kafka"},{"binary_version":"0.9.3-2","binary_name":"python3-kafka"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.2-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-kafka","binary_version":"1.3.2-0ubuntu1"},{"binary_name":"python3-kafka","binary_version":"1.3.2-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3-1","1.4.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-kafka","binary_version":"1.4.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.1-2","2.0.2-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.2-2","binary_name":"python3-kafka"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-4","2.0.2-5"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-kafka","binary_version":"2.0.2-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-9"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.2-9","binary_name":"python3-kafka"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}},{"package":{"name":"python-kafka","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/python-kafka?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-9","2.0.2-10","2.0.2-11"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.2-11","binary_name":"python3-kafka"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10143.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}