UnratedFix available
python3.9: Fix of 4 CVEs
Type: advisorySources: OSV
- CVE-2026-0672: reject control characters in http.cookies.Morsel keys/values - CVE-2026-3644: extend control-character rejection to Morsel.update(), |=, and __setstate__ - CVE-2026-4224: avoid unbound C recursion in pyexpat conv_content_model for deeply nested DTDs - CVE-2026-1502: reject CR/LF in HTTP tunnel request headers and tunnel host
- Products
- python-unversioned-command, python3, python3-debug, python3-devel, python3-idle, python3-libs, python3-test, python3-tkinter
- Affected versions
- Not specified
- Fixed versions
- 3.9.21-2.el9_6.2.tuxcare.els9
- CVEs
- CVE-2026-0672, CVE-2026-1502, CVE-2026-3644, CVE-2026-4224
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:56 UTC · Revision 1
Source evidence
- CVE-2026-0672: reject control characters in http.cookies.Morsel keys/values - CVE-2026-3644: extend control-character rejection to Morsel.update(), |=, and __setstate__ - CVE-2026-4224: avoid unbound C recursion in pyexpat conv_content_model for deeply nested DTDs - CVE-2026-1502: reject CR/LF in HTTP tunnel request headers and tunnel host
osv:CLSA-2026-1779886202
python-unversioned-command
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-debug
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-devel
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-idle
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-libs
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-test
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
python3-tkinter
Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els9
Complete source record
{
"id": "c6e102da0ccf44e080220602ac390ef54586e9e32f281628f976a5c27f96f2cf",
"url": "https://osv.dev/vulnerability/CLSA-2026-1779886202",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "python3.9: Fix of 4 CVEs",
"summary": "- CVE-2026-0672: reject control characters in http.cookies.Morsel keys/values - CVE-2026-3644: extend control-character rejection to Morsel.update(), |=, and __setstate__ - CVE-2026-4224: avoid unbound C recursion in pyexpat conv_content_model for deeply nested DTDs - CVE-2026-1502: reject CR/LF in HTTP tunnel request headers and tunnel host",
"evidence": "osv:CLSA-2026-1779886202",
"products": [
{
"name": {
"value": "python-unversioned-command",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.9.21-2.el9_6.2.tuxcare.els9",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"evidence": "/affected/1/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/2/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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{
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"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
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"evidence": "/affected/4/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
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"fixed_versions": [
{
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"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-test",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.9.21-2.el9_6.2.tuxcare.els9",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3-tkinter",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.9.21-2.el9_6.2.tuxcare.els9",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1779886202",
"aliases": [
"CLSA-2026-1779886202"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.9.21-2.el9_6.2.tuxcare.els9"
}
]
}
],
"package": {
"name": "python-unversioned-command",
"purl": "pkg:rpm/tuxcare/python-unversioned-command?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
{
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{
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{
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}
]
}
],
"package": {
"name": "python3",
"purl": "pkg:rpm/tuxcare/python3?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
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}
]
}
],
"package": {
"name": "python3-debug",
"purl": "pkg:rpm/tuxcare/python3-debug?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
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}
],
"package": {
"name": "python3-devel",
"purl": "pkg:rpm/tuxcare/python3-devel?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
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]
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],
"package": {
"name": "python3-idle",
"purl": "pkg:rpm/tuxcare/python3-idle?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
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],
"package": {
"name": "python3-libs",
"purl": "pkg:rpm/tuxcare/python3-libs?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
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}
]
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],
"package": {
"name": "python3-test",
"purl": "pkg:rpm/tuxcare/python3-test?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
},
{
"ranges": [
{
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},
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}
]
}
],
"package": {
"name": "python3-tkinter",
"purl": "pkg:rpm/tuxcare/python3-tkinter?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1779886202.json"
}
}
],
"modified": "2026-10-26T09:43:50.839805392Z",
"provider": "osv",
"upstream": [
"CVE-2026-0672",
"CVE-2026-1502",
"CVE-2026-3644",
"CVE-2026-4224"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1779886202.html"
]
},
"related_cves": [
{
"value": "CVE-2026-0672",
"evidence": "/upstream"
},
{
"value": "CVE-2026-1502",
"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": 450185,
"published_at": "2026-05-27T14:06:00+00:00"
}