CVE-2023-46695 (GCVE-0-2023-46695)
Vulnerability from cvelistv5 – Published: 2023-11-02 00:00 – Updated: 2024-08-02 20:53
VLAI
EPSS
VEX
Summary
An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters.
Severity
7.5 (High)
CWE
- n/a
Assigner
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T20:53:20.867Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"tags": [
"x_transferred"
],
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-12-14T10:06:39.801Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
},
{
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-46695",
"datePublished": "2023-11-02T00:00:00.000Z",
"dateReserved": "2023-10-25T00:00:00.000Z",
"dateUpdated": "2024-08-02T20:53:20.867Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-46695",
"date": "2026-09-20",
"epss": "0.49774",
"percentile": "0.98842"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9909EFAF-C1C8-49FA-860F-C2430EC5304D",
"versionEndExcluding": "3.2.23",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0ED58B2B-B564-4EE4-AE69-1E206AE34B65",
"versionEndExcluding": "4.1.13",
"versionStartIncluding": "4.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A76F97FB-F751-4E8A-B4CD-43ECEA9528CE",
"versionEndExcluding": "4.2.7",
"versionStartIncluding": "4.2.",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters."
},
{
"lang": "es",
"value": "Se descubri\u00f3 un problema en Django 3.2 anterior a 3.2.23, 4.1 anterior a 4.1.13 y 4.2 anterior a 4.2.7. La normalizaci\u00f3n de NFKC es lenta en Windows. Como consecuencia, django.contrib.auth.forms.UsernameField est\u00e1 sujeto a un potencial ataque DoS (denegaci\u00f3n de servicio) a trav\u00e9s de ciertas entradas con una gran cantidad de caracteres Unicode."
}
],
"id": "CVE-2023-46695",
"lastModified": "2024-11-21T08:29:05.987",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2023-11-02T06:15:08.000",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"source": "cve@mitre.org",
"tags": [
"Permissions Required"
],
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"source": "cve@mitre.org",
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Permissions Required"
],
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-770"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9909EFAF-C1C8-49FA-860F-C2430EC5304D",
"versionEndExcluding": "3.2.23",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0ED58B2B-B564-4EE4-AE69-1E206AE34B65",
"versionEndExcluding": "4.1.13",
"versionStartIncluding": "4.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A76F97FB-F751-4E8A-B4CD-43ECEA9528CE",
"versionEndExcluding": "4.2.7",
"versionStartIncluding": "4.2.",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters."
},
{
"lang": "es",
"value": "Se descubri\u00f3 un problema en Django 3.2 anterior a 3.2.23, 4.1 anterior a 4.1.13 y 4.2 anterior a 4.2.7. La normalizaci\u00f3n de NFKC es lenta en Windows. Como consecuencia, django.contrib.auth.forms.UsernameField est\u00e1 sujeto a un potencial ataque DoS (denegaci\u00f3n de servicio) a trav\u00e9s de ciertas entradas con una gran cantidad de caracteres Unicode."
}
],
"id": "CVE-2023-46695",
"lastModified": "2026-06-17T06:31:22.760",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2023-11-02T06:15:08.000",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"source": "cve@mitre.org",
"tags": [
"Permissions Required"
],
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"source": "cve@mitre.org",
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://docs.djangoproject.com/en/4.2/releases/security/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Permissions Required"
],
"url": "https://groups.google.com/forum/#%21forum/django-announce"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.netapp.com/advisory/ntap-20231214-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-770"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T15:02:08+00:00",
"cve": "CVE-2023-46695",
"id": "CVE-2023-46695",
"initial_release_date": "2023-11-01T07:00:00+00:00",
"product_status:known_affected": "4",
"product_status:known_not_affected": "15",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "python-django: Potential denial of service vulnerability in UsernameField on Windows",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-46695.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…