{"cve":"CVE-2025-64458","nvd":{"published":"2025-11-05T15:15:40.940","modified":"2026-06-17T09:54:24.323","status":"Analyzed","description":"An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8.\nNFKC normalization in Python is slow on Windows. As a consequence, `django.http.HttpResponseRedirect`, `django.http.HttpResponsePermanentRedirect`, and the shortcut `django.shortcuts.redirect`  were subject to a potential  denial-of-service attack via certain inputs with a very large number of Unicode characters.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-407"],"references":["https://docs.djangoproject.com/en/dev/releases/security/","https://groups.google.com/g/django-announce","https://www.djangoproject.com/weblog/2025/nov/05/security-releases/"],"products":["djangoproject:django"],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-64458","score":0.01909,"percentile":0.79779,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qw25-v68c-qjf3","url":"https://osv.dev/vulnerability/GHSA-qw25-v68c-qjf3","summary":"Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows","modified":"2026-09-10T03:50:58.508072395Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=5.2a1 <5.2.8"],"fixed":["5.2.8"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=5.0a1 <5.1.14"],"fixed":["5.1.14"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":["<4.2.26"],"fixed":["4.2.26"]}]},{"id":"PYSEC-2025-107","url":"https://osv.dev/vulnerability/PYSEC-2025-107","summary":"","modified":"2026-06-10T17:01:06.431713063Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=4.2 <4.2.26",">=5.1 <5.1.14",">=5.2 <5.2.8"],"fixed":["4.2.26","5.1.14","5.2.8"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}