MediumFix available
python-cryptography — security advisory
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.
- Products
- python-cryptography
- Affected versions
- 38.0.4-3, 38.0.4-3+deb12u1, 38.0.4-4, 41.0.7-1, 41.0.7-2, 41.0.7-3, 41.0.7-4, 41.0.7-5, 42.0.5-1, 42.0.5-2, 43.0.0-1, 43.0.0-2, 43.0.0-3, 43.0.0-3+deb13u1, 44.0.2-1, 44.0.2-2, 45.0.6-1, 45.0.6-1~exp1, 45.0.7-1, 46.0.1-1, 46.0.1-1~exp1, 46.0.5-1, 46.0.5-2, 46.0.6-1, 46.0.7-1, 47.0.0-1, 49.0.0-1, 49.0.0-1~exp1, 49.0.0-2
- Fixed versions
- 46.0.6-1
- CVEs
- CVE-2026-34073
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:23 UTC · Revision 1
Source evidence
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.
osv:DEBIAN-CVE-2026-34073
python-cryptography
Fixed versions: Not specified
python-cryptography
Fixed versions: Not specified
python-cryptography
Fixed versions: 46.0.6-1
Complete source record
{
"id": "42b1e33fea7742541ffb2b9ec7ab919770b9f70241fe17c5277539259e3fda28",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-34073",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-34073",
"summary": "cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the \"peer name\" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.",
"evidence": "osv:DEBIAN-CVE-2026-34073",
"products": [
{
"name": {
"value": "python-cryptography",
"evidence": "/affected/0/package/name"
},
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"fixed_versions": [],
"affected_versions": [
{
"value": "38.0.4-3",
"evidence": "/affected/0/versions"
},
{
"value": "38.0.4-3+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "38.0.4-4",
"evidence": "/affected/0/versions"
},
{
"value": "41.0.7-1",
"evidence": "/affected/0/versions"
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{
"value": "41.0.7-2",
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{
"value": "41.0.7-3",
"evidence": "/affected/0/versions"
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{
"value": "41.0.7-4",
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{
"value": "41.0.7-5",
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{
"value": "42.0.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "42.0.5-2",
"evidence": "/affected/0/versions"
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{
"value": "43.0.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "43.0.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "43.0.0-3",
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{
"value": "44.0.2-1",
"evidence": "/affected/0/versions"
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{
"value": "44.0.2-2",
"evidence": "/affected/0/versions"
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{
"value": "45.0.6-1",
"evidence": "/affected/0/versions"
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{
"value": "45.0.6-1~exp1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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{
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"evidence": "/affected/0/versions"
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{
"value": "46.0.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "46.0.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "46.0.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "46.0.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "47.0.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "49.0.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "49.0.0-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "49.0.0-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "python-cryptography",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "43.0.0-3",
"evidence": "/affected/1/versions"
},
{
"value": "43.0.0-3+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "44.0.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "44.0.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "45.0.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "45.0.6-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "45.0.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.1-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.5-2",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "46.0.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "47.0.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "49.0.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "49.0.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "49.0.0-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "python-cryptography",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "46.0.6-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "43.0.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "44.0.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "44.0.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "45.0.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "45.0.6-1~exp1",
"evidence": "/affected/2/versions"
},
{
"value": "45.0.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "46.0.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "46.0.1-1~exp1",
"evidence": "/affected/2/versions"
},
{
"value": "46.0.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "46.0.5-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-34073",
"aliases": [
"DEBIAN-CVE-2026-34073"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"38.0.4-3",
"38.0.4-3+deb12u1",
"38.0.4-4",
"41.0.7-1",
"41.0.7-2",
"41.0.7-3",
"41.0.7-4",
"41.0.7-5",
"42.0.5-1",
"42.0.5-2",
"43.0.0-1",
"43.0.0-2",
"43.0.0-3",
"44.0.2-1",
"44.0.2-2",
"45.0.6-1",
"45.0.6-1~exp1",
"45.0.7-1",
"46.0.1-1",
"46.0.1-1~exp1",
"46.0.5-1",
"46.0.5-2",
"46.0.6-1",
"46.0.7-1",
"47.0.0-1",
"49.0.0-1",
"49.0.0-1~exp1",
"49.0.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34073.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"43.0.0-3",
"43.0.0-3+deb13u1",
"44.0.2-1",
"44.0.2-2",
"45.0.6-1",
"45.0.6-1~exp1",
"45.0.7-1",
"46.0.1-1",
"46.0.1-1~exp1",
"46.0.5-1",
"46.0.5-2",
"46.0.6-1",
"46.0.7-1",
"47.0.0-1",
"49.0.0-1",
"49.0.0-1~exp1",
"49.0.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34073.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "46.0.6-1"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"43.0.0-3",
"44.0.2-1",
"44.0.2-2",
"45.0.6-1",
"45.0.6-1~exp1",
"45.0.7-1",
"46.0.1-1",
"46.0.1-1~exp1",
"46.0.5-1",
"46.0.5-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34073.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:32.150969994Z",
"provider": "osv",
"upstream": [
"CVE-2026-34073"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-34073"
]
},
"related_cves": [
{
"value": "CVE-2026-34073",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 327633,
"published_at": "2026-03-31T03:15:59.123+00:00"
}