{"id":"CLSA-2026-1778505256","summary":"python: Fix of 2 CVEs","details":"- CVE-2021-3733: fix ReDoS in urllib2 AbstractBasicAuthHandler regex; the\n  legacy '(?:.*,)*' prefix is replaced with the upstream-3.x form\n  '(?:^|,)' and the scheme charset excludes ',' to prevent quadratic\n  backtracking on crafted WWW-Authenticate headers\n- CVE-2021-23336: stop accepting ';' as a default query-string separator\n  in urlparse.parse_qs/parse_qsl and cgi.parse* / FieldStorage; only '&'\n  is used by default, with an opt-in 'separator' kwarg for callers that\n  need legacy behavior\n- Additional tests for CVE-2021-23336: drop obsolete legacy-';' entries\n  from Lib/test/test_cgi.py parse_strict_test_cases","modified":"2026-06-01T00:33:14.240250752Z","published":"2026-05-11T13:14:21Z","upstream":["CVE-2021-3733","CVE-2021-23336"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/oraclelinux7els/CLSA-2026-1778505256.html"}],"affected":[{"package":{"name":"python","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"python-debug","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python-debug?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"python-devel","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python-devel?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"python-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"python-test","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python-test?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"python-tools","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/python-tools?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}},{"package":{"name":"tkinter","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tkinter?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-94.0.1.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1778505256.json"}}],"schema_version":"1.7.5"}