{"id":"ALSA-2026:40856","summary":"Important: python3.14 security update","details":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.  \n\nSecurity Fix(es):  \n\n  * python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations (CVE-2026-15308)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","modified":"2026-07-20T15:15:04.612058787Z","published":"2026-07-16T00:00:00Z","related":["CVE-2026-15308"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40856"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-15308"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2498608"},{"type":"ADVISORY","url":"https://errata.almalinux.org/10/ALSA-2026-40856.html"}],"affected":[{"package":{"name":"python3.14","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-debug","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-devel","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-debug","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-devel","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-idle","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-idle"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-libs","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-libs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-test","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-test"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-freethreading-tkinter","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-freethreading-tkinter"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-idle","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-idle"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-libs","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-libs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-test","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/python3.14-test"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.5-1.el10_2.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:40856.json"}},{"package":{"name":"python3.14-tkinter","ecosys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