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.
CVE-2023-46695
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 3.6%, top 12% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 98.8%
- KEV
- Not listed
Published
November 2, 2023
Last Modified
June 17, 2026
References (8)
- cve@mitrehttps://docs.djangoproject.com/en/4.2/releases/security/
- cve@mitrehttps://groups.google.com/forum/#%21forum/django-announce
- cve@mitrehttps://security.netapp.com/advisory/ntap-20231214-0001/
- cve@mitrehttps://www.djangoproject.com/weblog/2023/nov/01/security-releases/
- af854a3a-2127-422b-91ae-364da2661108https://docs.djangoproject.com/en/4.2/releases/security/
- af854a3a-2127-422b-91ae-364da2661108https://groups.google.com/forum/#%21forum/django-announce
- af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231214-0001/
- af854a3a-2127-422b-91ae-364da2661108https://www.djangoproject.com/weblog/2023/nov/01/security-releases/
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| django | 3.2 ... 4.2.6 (43 versions) | 4.2.7 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 31× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:06 UTCEPSS rescore
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- 2026-05-24 14:38 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-770
Frequently asked(5)
What is CVE-2023-46695?
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Dependency Blast Radius
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