UnratedFix available
python-django — security advisory
Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.
- Products
- python-django
- Affected versions
- Not specified
- Fixed versions
- 1.1.1-1
- CVEs
- CVE-2009-3695
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 23:16 UTC · Revision 1
Source evidence
Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.
osv:DEBIAN-CVE-2009-3695
python-django
Fixed versions: 1.1.1-1
python-django
Fixed versions: 1.1.1-1
python-django
Fixed versions: 1.1.1-1
Complete source record
{
"id": "c7d7b0ba8323a69c6f769e66d45c31b68c8b54eacea6c73baab4f65b5fee4e99",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-3695",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2009-3695",
"summary": "Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.",
"evidence": "osv:DEBIAN-CVE-2009-3695",
"products": [
{
"name": {
"value": "python-django",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.1.1-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-django",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.1.1-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-django",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.1.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "DEBIAN-CVE-2009-3695",
"aliases": [
"DEBIAN-CVE-2009-3695"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.1-1"
}
]
}
],
"package": {
"name": "python-django",
"purl": "pkg:deb/debian/python-django?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-3695.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
},
{
"ranges": [
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"events": [
{
"introduced": "0"
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{
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}
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}
],
"package": {
"name": "python-django",
"purl": "pkg:deb/debian/python-django?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-3695.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.1-1"
}
]
}
],
"package": {
"name": "python-django",
"purl": "pkg:deb/debian/python-django?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-3695.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
}
],
"modified": "2026-10-23T17:47:38.950210019Z",
"provider": "osv",
"upstream": [
"CVE-2009-3695"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2009-3695"
]
},
"related_cves": [
{
"value": "CVE-2009-3695",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 418141,
"published_at": "2009-10-13T10:30:00.767+00:00"
}