Security update for python3

Open Source Vulnerabilities SUSE-SU-2026:1715-1

This update for python3 fixes the following issues: - CVE-2025-13462: incorrect parsing of TarInfo when GNU long name and type AREGTYPE are combined can lead to misinterpretation of tar archives (bsc#1259611). - CVE-2026-1502: HTTP client proxy tunnel headers not validated for CR/LF (bsc#1261969). - CVE-2026-3446: base64 decoding stops at first padded quad by default and ignores other information that could be processed (bsc#1261970). - CVE-2026-3479: improper resource argument validation in `pkgutil.get_data()` can lead to path traversal (bsc#1259989). - CVE-2026-3644: incomplete control character validation in http.cookies can lead to input validation bypass (bsc#1259734). - CVE-2026-4224: parsing XML with deeply nested DTD content models can lead to C stack overflow (bsc#1259735). - CVE-2026-4519: failure to sanitize leading dashes in URLs in the `webbrowser.open()` API can lead to web browser command line option injection (bsc#1260026). - CVE-2026-4786: URLs prefixed with `%action` can pass the dash-prefix safety check and allow for command injection (bsc#1262319). - CVE-2026-6019: `BaseCookie.js_output()` does not neutralize characters in cookie values embedded in JS (bsc#1262654). - CVE-2026-6100: use-after-free in `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile` when process is under memory pressure(bsc#1262098).