HighFix available
python3.11, python3.13 and 1 more products — security advisory
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().
- Products
- python3.11, python3.13, python3.14
- Affected versions
- 3.11.2-6, 3.11.2-6+deb12u1, 3.11.2-6+deb12u2, 3.11.2-6+deb12u3, 3.11.2-6+deb12u4, 3.11.2-6+deb12u5, 3.11.2-6+deb12u6, 3.11.2-6+deb12u7, 3.13.11-1, 3.13.12-1, 3.13.5-2, 3.13.5-2+deb13u1, 3.13.6-1, 3.13.7-1, 3.13.8-1, 3.13.9-1, 3.14.0-1, 3.14.0-2, 3.14.0-3, 3.14.0-4, 3.14.0-5, 3.14.0~a7-1, 3.14.0~b1-1, 3.14.0~b2-1, 3.14.0~b3-1, 3.14.0~b4-1, 3.14.0~rc1-1, 3.14.0~rc2-1, 3.14.0~rc3-1, 3.14.2-1, 3.14.3-1, 3.14.3-2, 3.14.3-3
- Fixed versions
- 3.11.2-6+deb12u8, 3.13.14-1, 3.13.5-2+deb13u2, 3.14.3-4
- CVEs
- CVE-2026-3644
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 04:33 UTC · Revision 1
Source evidence
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().
osv:DEBIAN-CVE-2026-3644
python3.11
Fixed versions: 3.11.2-6+deb12u8
python3.13
Fixed versions: 3.13.5-2+deb13u2
python3.13
Fixed versions: 3.13.14-1
python3.14
Fixed versions: 3.14.3-4
Complete source record
{
"id": "7ba63bb011d237d524be671d119ea8e8028cdc14389dbab6f5373a025f904f75",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-3644",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-3644",
"summary": "The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().",
"evidence": "osv:DEBIAN-CVE-2026-3644",
"products": [
{
"name": {
"value": "python3.11",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.11.2-6+deb12u8",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "3.11.2-6",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u6",
"evidence": "/affected/0/versions"
},
{
"value": "3.11.2-6+deb12u7",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "python3.13",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.13.5-2+deb13u2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "3.13.5-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.13.5-2+deb13u1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "python3.13",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.13.14-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "3.13.11-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.12-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.5-2",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.13.9-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "python3.14",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.14.3-4",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "3.14.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0-2",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0-3",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0-4",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0-5",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~a7-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~b1-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~b2-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~b3-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~b4-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~rc1-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~rc2-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.0~rc3-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.2-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.3-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.3-2",
"evidence": "/affected/3/versions"
},
{
"value": "3.14.3-3",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-3644",
"aliases": [
"DEBIAN-CVE-2026-3644"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.11.2-6+deb12u8"
}
]
}
],
"package": {
"name": "python3.11",
"purl": "pkg:deb/debian/python3.11?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.11.2-6",
"3.11.2-6+deb12u1",
"3.11.2-6+deb12u2",
"3.11.2-6+deb12u3",
"3.11.2-6+deb12u4",
"3.11.2-6+deb12u5",
"3.11.2-6+deb12u6",
"3.11.2-6+deb12u7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3644.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.13.5-2+deb13u2"
}
]
}
],
"package": {
"name": "python3.13",
"purl": "pkg:deb/debian/python3.13?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.13.5-2",
"3.13.5-2+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3644.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.13.14-1"
}
]
}
],
"package": {
"name": "python3.13",
"purl": "pkg:deb/debian/python3.13?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.13.11-1",
"3.13.12-1",
"3.13.5-2",
"3.13.6-1",
"3.13.7-1",
"3.13.8-1",
"3.13.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3644.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.3-4"
}
]
}
],
"package": {
"name": "python3.14",
"purl": "pkg:deb/debian/python3.14?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.14.0-1",
"3.14.0-2",
"3.14.0-3",
"3.14.0-4",
"3.14.0-5",
"3.14.0~a7-1",
"3.14.0~b1-1",
"3.14.0~b2-1",
"3.14.0~b3-1",
"3.14.0~b4-1",
"3.14.0~rc1-1",
"3.14.0~rc2-1",
"3.14.0~rc3-1",
"3.14.2-1",
"3.14.3-1",
"3.14.3-2",
"3.14.3-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3644.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-07T16:00:08.983332010Z",
"provider": "osv",
"upstream": [
"CVE-2026-3644"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-3644"
]
},
"related_cves": [
{
"value": "CVE-2026-3644",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 95133,
"published_at": "2026-03-16T18:16:09.907+00:00"
}