Fix CVE(s): CVE-2025-13462, CVE-2026-0672, CVE-2026-3644, CVE-2026-4224
* SECURITY UPDATE: C stack overflow (DoS) in pyexpat when parsing deeply nested DTD content models - debian/patches/CVE-2026-4224.patch: guard conv_content_model() in Modules/pyexpat.c with Py_EnterRecursiveCall/Py_LeaveRecursiveCall to bound recursion when a registered ElementDeclHandler converts a deeply nested content model. - CVE-2026-4224 * SECURITY UPDATE: HTTP header injection via control characters in cookies - debian/patches/CVE-2026-0672.patch: add _has_control_character() and reject control characters in Morsel.__setitem__()/setdefault()/set() and BaseCookie.output() in Lib/http/cookies.py. - CVE-2026-0672 * SECURITY UPDATE: incomplete fix for CVE-2026-0672 (control characters in cookies via additional Morsel paths) - debian/patches/CVE-2026-3644.patch: reject control characters in Morsel.update(), Morsel.__setstate__() and Morsel.js_output() in Lib/http/cookies.py. - CVE-2026-3644 * SECURITY UPDATE: tarfile member type confusion (regular file parsed as directory) via GNU long name/link headers - debian/patches/CVE-2025-13462.patch: skip the AREGTYPE->DIRTYPE normalization while reading GNU LONGNAME/LONGLINK and PAX follow-up headers (dircheck=False) in Lib/tarfile.py. - CVE-2025-13462
- Products
- idle-python3.5, libpython3.5, libpython3.5-dev, libpython3.5-minimal, libpython3.5-stdlib, libpython3.5-testsuite, python3.5, python3.5-dev, python3.5-doc, python3.5-examples, python3.5-minimal, python3.5-venv
- Affected versions
- Not specified
- Fixed versions
- 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
- CVEs
- CVE-2025-13462, CVE-2026-0672, CVE-2026-3644, CVE-2026-4224
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:37 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2025-13462, CVE-2026-0672, CVE-2026-3644, CVE-2026-4224
core-osv · Original sourcePublished 11 Jun 2026, 10:26 UTC
* SECURITY UPDATE: C stack overflow (DoS) in pyexpat when parsing deeply nested DTD content models - debian/patches/CVE-2026-4224.patch: guard conv_content_model() in Modules/pyexpat.c with Py_EnterRecursiveCall/Py_LeaveRecursiveCall to bound recursion when a registered ElementDeclHandler converts a deeply nested content model. - CVE-2026-4224 * SECURITY UPDATE: HTTP header injection via control characters in cookies - debian/patches/CVE-2026-0672.patch: add _has_control_character() and reject control characters in Morsel.__setitem__()/setdefault()/set() and BaseCookie.output() in Lib/http/cookies.py. - CVE-2026-0672 * SECURITY UPDATE: incomplete fix for CVE-2026-0672 (control characters in cookies via additional Morsel paths) - debian/patches/CVE-2026-3644.patch: reject control characters in Morsel.update(), Morsel.__setstate__() and Morsel.js_output() in Lib/http/cookies.py. - CVE-2026-3644 * SECURITY UPDATE: tarfile member type confusion (regular file parsed as directory) via GNU long name/link headers - debian/patches/CVE-2025-13462.patch: skip the AREGTYPE->DIRTYPE normalization while reading GNU LONGNAME/LONGLINK and PAX follow-up headers (dircheck=False) in Lib/tarfile.py. - CVE-2025-13462
osv:CLSA-2026-1781173352
idle-python3.5
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
libpython3.5
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
libpython3.5-dev
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
libpython3.5-minimal
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
libpython3.5-stdlib
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
libpython3.5-testsuite
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5-dev
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5-doc
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5-examples
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5-minimal
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
python3.5-venv
Fixed versions: 1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26
Complete source record
{
"id": "2607eaec9e47b7c515aaee3125dbf3fcc746da31cb5802aa26e8b92ba5742984",
"url": "https://osv.dev/vulnerability/CLSA-2026-1781173352",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2025-13462, CVE-2026-0672, CVE-2026-3644, CVE-2026-4224",
"summary": "* SECURITY UPDATE: C stack overflow (DoS) in pyexpat when parsing deeply nested DTD content models - debian/patches/CVE-2026-4224.patch: guard conv_content_model() in Modules/pyexpat.c with Py_EnterRecursiveCall/Py_LeaveRecursiveCall to bound recursion when a registered ElementDeclHandler converts a deeply nested content model. - CVE-2026-4224 * SECURITY UPDATE: HTTP header injection via control characters in cookies - debian/patches/CVE-2026-0672.patch: add _has_control_character() and reject control characters in Morsel.__setitem__()/setdefault()/set() and BaseCookie.output() in Lib/http/cookies.py. - CVE-2026-0672 * SECURITY UPDATE: incomplete fix for CVE-2026-0672 (control characters in cookies via additional Morsel paths) - debian/patches/CVE-2026-3644.patch: reject control characters in Morsel.update(), Morsel.__setstate__() and Morsel.js_output() in Lib/http/cookies.py. - CVE-2026-3644 * SECURITY UPDATE: tarfile member type confusion (regular file parsed as directory) via GNU long name/link headers - debian/patches/CVE-2025-13462.patch: skip the AREGTYPE->DIRTYPE normalization while reading GNU LONGNAME/LONGLINK and PAX follow-up headers (dircheck=False) in Lib/tarfile.py. - CVE-2025-13462",
"evidence": "osv:CLSA-2026-1781173352",
"products": [
{
"name": {
"value": "idle-python3.5",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.5",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.5-dev",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.5-minimal",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.5-stdlib",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.5-testsuite",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5-dev",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5-doc",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5-examples",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5-minimal",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.5-venv",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1781173352",
"aliases": [
"CLSA-2026-1781173352"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "idle-python3.5",
"purl": "pkg:deb/tuxcare/idle-python3.5?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "libpython3.5",
"purl": "pkg:deb/tuxcare/libpython3.5?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "libpython3.5-dev",
"purl": "pkg:deb/tuxcare/libpython3.5-dev?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "libpython3.5-minimal",
"purl": "pkg:deb/tuxcare/libpython3.5-minimal?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "libpython3.5-stdlib",
"purl": "pkg:deb/tuxcare/libpython3.5-stdlib?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "libpython3.5-testsuite",
"purl": "pkg:deb/tuxcare/libpython3.5-testsuite?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5",
"purl": "pkg:deb/tuxcare/python3.5?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5-dev",
"purl": "pkg:deb/tuxcare/python3.5-dev?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5-doc",
"purl": "pkg:deb/tuxcare/python3.5-doc?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5-examples",
"purl": "pkg:deb/tuxcare/python3.5-examples?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5-minimal",
"purl": "pkg:deb/tuxcare/python3.5-minimal?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:3.5.2-2ubuntu0~16.04.13+tuxcare.els26"
}
]
}
],
"package": {
"name": "python3.5-venv",
"purl": "pkg:deb/tuxcare/python3.5-venv?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1781173352.json"
}
}
],
"modified": "2026-10-26T09:32:00.767515318Z",
"provider": "osv",
"upstream": [
"CVE-2025-13462",
"CVE-2026-0672",
"CVE-2026-3644",
"CVE-2026-4224"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1781173352.html",
"https://nvd.nist.gov/vuln/detail/CVE-2025-13462",
"https://nvd.nist.gov/vuln/detail/CVE-2026-0672",
"https://nvd.nist.gov/vuln/detail/CVE-2026-3644",
"https://nvd.nist.gov/vuln/detail/CVE-2026-4224"
]
},
"related_cves": [
{
"value": "CVE-2025-13462",
"evidence": "/upstream"
},
{
"value": "CVE-2026-0672",
"evidence": "/upstream"
},
{
"value": "CVE-2026-3644",
"evidence": "/upstream"
},
{
"value": "CVE-2026-4224",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449296,
"published_at": "2026-06-11T10:26:46+00:00"
}