{"id":"CLSA-2026-1791820487","summary":"Fix CVE(s): CVE-2026-19445, CVE-2026-4786","details":"   * SECURITY UPDATE: use-after-free in the ssl module when a servername\n     callback switches the connection to another SSLContext\n     - debian/patches/CVE-2026-19445.patch: look the SSLContext up from the\n       SSL object instead of the borrowed servername-callback argument and\n       hold references to it and to the callback while they are used, and\n       unregister the callback when the context is deallocated, in\n       Modules/_ssl.c, so a TLS client can no longer make the server call\n       through a freed SSLContext; adds the upstream regression tests to\n       Lib/test/test_ssl.py.\n     - CVE-2026-19445","modified":"2026-10-26T09:32:04.373125890Z","published":"2026-10-19T20:55:08Z","upstream":["CVE-2026-19445","CVE-2026-4786"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1791820487.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19445"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4786"}],"affected":[{"package":{"name":"idle-python3.6","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/idle-python3.6?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"libpython3.6","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libpython3.6?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"libpython3.6-dev","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libpython3.6-dev?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"libpython3.6-minimal","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libpython3.6-minimal?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"libpython3.6-stdlib","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libpython3.6-stdlib?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"libpython3.6-testsuite","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libpython3.6-testsuite?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6-dev","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6-dev?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6-doc","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6-doc?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6-examples","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6-examples?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6-minimal","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6-minimal?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"}},{"package":{"name":"python3.6-venv","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/python3.6-venv?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.12+tuxcare.els27"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/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