CLSA-2026-1777998709 python2: Fix of 3 CVEs

CVE-2025-8194: validate that tarfile member offsets are non-negative to prevent infinite loop / DoS during parsing of malicious tar archives - CVE-2026-4519: reject URLs with leading dashes in webbrowser.open to prevent injection of command-line options into spawned browser process -...

CLSA-2026-1777946871 python: Fix of CVE-2026-4519

CVE-2026-4519: reject leading dashes in webbrowser URLs that could be treated as command-line options by external browsers; also close a %action-substitution bypass of the check in UnixBrowser.open...

CLSA-2026-1777946712 python: Fix of CVE-2026-4519

CVE-2026-4519: reject leading dashes in webbrowser URLs that could be treated as command-line options by external browsers; also close a %action-substitution bypass of the check in UnixBrowser.open...