UnratedFix available
python3: Fix of 3 CVEs
Type: advisorySources: OSV
- CVE-2026-0672: reject control characters in http.cookies Morsel keys, values, and parameters (and in BaseCookie.output) to prevent HTTP header injection via user-controlled cookie data - CVE-2026-3644: follow-up to CVE-2026-0672, rejecting control characters in the http.cookies.Morsel paths the original fix missed (update(), the |= operator, and unpickling) and validating Morsel.js_output() output - CVE-2026-4224: guard conv_content_model() in pyexpat against unbounded C recursion when an ElementDeclHandler parses a deeply nested inline DTD content model, raising RecursionError instead of crashing the interpreter
- Products
- platform-python, platform-python-debug, platform-python-devel, python3-devel, python3-idle, python3-libs, python3-test, python3-tkinter
- Affected versions
- Not specified
- Fixed versions
- 3.6.8-40.el8_4.tuxcare.els22
- CVEs
- CVE-2026-0672, CVE-2026-3644, CVE-2026-4224
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:10 UTC · Revision 1
Source evidence
- CVE-2026-0672: reject control characters in http.cookies Morsel keys, values, and parameters (and in BaseCookie.output) to prevent HTTP header injection via user-controlled cookie data - CVE-2026-3644: follow-up to CVE-2026-0672, rejecting control characters in the http.cookies.Morsel paths the original fix missed (update(), the |= operator, and unpickling) and validating Morsel.js_output() output - CVE-2026-4224: guard conv_content_model() in pyexpat against unbounded C recursion when an ElementDeclHandler parses a deeply nested inline DTD content model, raising RecursionError instead of crashing the interpreter
osv:CLSA-2026-1782159334
platform-python
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
platform-python-debug
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
platform-python-devel
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
python3-devel
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
python3-idle
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
python3-libs
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
python3-test
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
python3-tkinter
Fixed versions: 3.6.8-40.el8_4.tuxcare.els22
Complete source record
{
"id": "96a953410cd17bec4842e996493624fe2241538794fc6e8b1a7e10b55d05935a",
"url": "https://osv.dev/vulnerability/CLSA-2026-1782159334",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "python3: Fix of 3 CVEs",
"summary": "- CVE-2026-0672: reject control characters in http.cookies Morsel keys, values, and parameters (and in BaseCookie.output) to prevent HTTP header injection via user-controlled cookie data - CVE-2026-3644: follow-up to CVE-2026-0672, rejecting control characters in the http.cookies.Morsel paths the original fix missed (update(), the |= operator, and unpickling) and validating Morsel.js_output() output - CVE-2026-4224: guard conv_content_model() in pyexpat against unbounded C recursion when an ElementDeclHandler parses a deeply nested inline DTD content model, raising RecursionError instead of crashing the interpreter",
"evidence": "osv:CLSA-2026-1782159334",
"products": [
{
"name": {
"value": "platform-python",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "platform-python-debug",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "platform-python-devel",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-devel",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-idle",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-libs",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-test",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-tkinter",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.8-40.el8_4.tuxcare.els22",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1782159334",
"aliases": [
"CLSA-2026-1782159334"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.8-40.el8_4.tuxcare.els22"
}
]
}
],
"package": {
"name": "platform-python",
"purl": "pkg:rpm/tuxcare/platform-python?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.8-40.el8_4.tuxcare.els22"
}
]
}
],
"package": {
"name": "platform-python-debug",
"purl": "pkg:rpm/tuxcare/platform-python-debug?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "platform-python-devel",
"purl": "pkg:rpm/tuxcare/platform-python-devel?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
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}
]
}
],
"package": {
"name": "python3-devel",
"purl": "pkg:rpm/tuxcare/python3-devel?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
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{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "python3-idle",
"purl": "pkg:rpm/tuxcare/python3-idle?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
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}
]
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],
"package": {
"name": "python3-libs",
"purl": "pkg:rpm/tuxcare/python3-libs?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
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{
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},
{
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}
]
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],
"package": {
"name": "python3-test",
"purl": "pkg:rpm/tuxcare/python3-test?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.8-40.el8_4.tuxcare.els22"
}
]
}
],
"package": {
"name": "python3-tkinter",
"purl": "pkg:rpm/tuxcare/python3-tkinter?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1782159334.json"
}
}
],
"modified": "2026-10-26T09:31:49.612747075Z",
"provider": "osv",
"upstream": [
"CVE-2026-0672",
"CVE-2026-3644",
"CVE-2026-4224"
],
"references": [
"https://errata.tuxcare.com/els_os/centos8.4els/CLSA-2026-1782159334.html",
"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-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": 448582,
"published_at": "2026-06-24T09:18:00+00:00"
}