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: reject control characters in Morsel.__setitem__()/set(), add a validating Morsel.setdefault() override, and guard BaseCookie.output() in Lib/Cookie.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: add a validating Morsel.update() override and reject control characters in Morsel.js_output() in Lib/Cookie.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-python2.7, libpython2.7, libpython2.7-dev, libpython2.7-minimal, libpython2.7-stdlib, libpython2.7-testsuite, python2.7, python2.7-dev, python2.7-doc, python2.7-examples, python2.7-minimal
- Affected versions
- Not specified
- Fixed versions
- 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
- 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 13 Jun 2026, 09:27 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: reject control characters in Morsel.__setitem__()/set(), add a validating Morsel.setdefault() override, and guard BaseCookie.output() in Lib/Cookie.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: add a validating Morsel.update() override and reject control characters in Morsel.js_output() in Lib/Cookie.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-2026-1781342809
idle-python2.7
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
libpython2.7
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
libpython2.7-dev
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
libpython2.7-minimal
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
libpython2.7-stdlib
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
libpython2.7-testsuite
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
python2.7
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
python2.7-dev
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
python2.7-doc
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
python2.7-examples
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
python2.7-minimal
Fixed versions: 2.7.12-1ubuntu0~16.04.18+tuxcare.els19
Complete source record
{
"id": "017edf3c7c2be7a63e76284f06ec8d7be1228c93a7d802c757957b9dc56de60b",
"url": "https://osv.dev/vulnerability/CLSA-2026-1781342809",
"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: reject control characters in Morsel.__setitem__()/set(), add a validating Morsel.setdefault() override, and guard BaseCookie.output() in Lib/Cookie.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: add a validating Morsel.update() override and reject control characters in Morsel.js_output() in Lib/Cookie.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",
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{
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"affected_versions": []
},
{
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"evidence": "/affected/8/package/name"
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{
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"evidence": "/affected/8/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/9/package/name"
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"prerequisites": [],
"fixed_versions": [
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{
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"severity": "unknown",
"structured": {
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"aliases": [
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"affected": [
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"package": {
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"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
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{
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7?distro=ubuntu-16.04",
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"database_specific": {
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-minimal?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
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"database_specific": {
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"package": {
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"database_specific": {
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"package": {
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"database_specific": {
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{
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"package": {
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"purl": "pkg:deb/tuxcare/python2.7-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-2026-1781342809.json"
}
}
],
"modified": "2026-10-26T09:32:00.775591021Z",
"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-2026-1781342809.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": 449307,
"published_at": "2026-06-13T09:27:31+00:00"
}