{"id":"CLSA-2026-1781259901","summary":"Fix CVE(s): CVE-2025-13462, CVE-2026-3644, CVE-2026-4224, CVE-2026-7210","details":"   * SECURITY UPDATE: tarfile AREGTYPE-\u003eDIRTYPE misnormalization of multi-block member headers\n     - debian/patches/CVE-2025-13462.patch: in Lib/tarfile.py, add a dircheck flag to\n       frombuf()/fromtarfile() and read the follow-up header of GNU long-name and PAX\n       multi-block members with dircheck=False in _proc_gnulong()/_proc_pax(), so the old-V7\n       \"AREGTYPE name ending in / is a directory\" normalization is no longer applied to a\n       follow-up header based on its truncated name. Prevents a crafted tar archive from being\n       interpreted differently by tarfile than by other tools. Backport of upstream commit\n       42d754e34c (gh-141707), the same fix shipped by Debian in DLA-4583-1; applies to 3.7.3\n       without code changes (the affected functions are structurally identical). Bundles the\n       upstream regression test test_longname_file_not_directory (test_tarfile.py).\n     - CVE-2025-13462\n   * SECURITY UPDATE: C stack overflow in pyexpat via deeply nested DTD content model\n     - debian/patches/CVE-2026-4224.patch: guard the recursion in Modules/pyexpat.c\n       conv_content_model() with Py_EnterRecursiveCall()/Py_LeaveRecursiveCall() so a deeply\n       nested inline DTD content model parsed by an Expat parser with a registered\n       ElementDeclHandler raises RecursionError instead of crashing the interpreter. Adapted\n       from upstream commit eb0e8be3a7 (gh-145986); upstream uses the private\n       _Py_EnterRecursiveCall() API, replaced here with the equivalent public 3.7 macros. The\n       upstream regression test is not bundled (it needs 3.7-absent test.support helpers and a\n       500000-deep model); the fix was verified manually.\n     - CVE-2026-4224\n   * SECURITY UPDATE: control-character injection in http.cookies (HTTP response splitting)\n     - debian/patches/CVE-2026-3644.patch: reject control characters (\\x00-\\x1F, \\x7F) in\n       Lib/http/cookies.py across all Morsel/BaseCookie paths via a new _has_control_character()\n       helper. CVE-2026-3644 is the incomplete-fix follow-up to CVE-2026-0672 and its upstream\n       fix (commit 57e88c1cf9, gh-145599) depends on the helper introduced by the CVE-2026-0672\n       base commit (95746b3a13, gh-143919). 3.7.3 shipped neither fix, so this patch bundles both:\n       the base validation in Morsel.__setitem__/setdefault/set and BaseCookie.output, plus the\n       follow-up validation in Morsel.update/__setstate__ and BaseCookie.js_output.\n       Also closes CVE-2026-0672. The upstream Morsel.__ior__ override is omitted: it only exists\n       to neutralize dict.__ior__ (PEP 584, Python 3.9+), which 3.7 does not have, so there is no\n       |= bypass to close. The module docstring doctest and the test_basic keebler fixture in\n       test_http_cookies.py are updated to drop a \\012 control character now rejected by load(),\n       and the upstream regression tests test_control_characters/test_control_characters_output\n       are bundled with the test.support.control_characters_c0() helper they require.\n     - CVE-2026-3644","modified":"2026-10-26T09:43:11.830049500Z","published":"2026-06-12T10:27:16Z","upstream":["CVE-2025-13462","CVE-2026-0672","CVE-2026-3644","CVE-2026-4224","CVE-2026-7210"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/debian10els/CLSA-2026-1781259901.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13462"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3644"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4224"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7210"}],"affected":[{"package":{"name":"idle-python3.7","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/idle-python3.7?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"libpython3.7","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/libpython3.7?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"libpython3.7-dev","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/libpython3.7-dev?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"libpython3.7-minimal","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/libpython3.7-minimal?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"libpython3.7-stdlib","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/libpython3.7-stdlib?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"libpython3.7-testsuite","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/libpython3.7-testsuite?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7-dev","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7-dev?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7-doc","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7-doc?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7-examples","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7-examples?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7-minimal","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7-minimal?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1781259901.json"}},{"package":{"name":"python3.7-venv","ecosystem":"TuxCare:Debian:10","purl":"pkg:deb/tuxcare/python3.7-venv?distro=debian-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2+deb10u7+tuxcare.els5"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian1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