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Fencer Intel
high 7.5

CVE-2025-64458 json

Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows

published 2025-11-05 12 mo ago modified 2026-09-10 1 mo ago also BIT-django-2025-64458 , EUVD-2025-37765 , GHSA-qw25-v68c-qjf3 , PYSEC-2025-107

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8. NFKC 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. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.

Patch / fix

  • pypi django 4.2.26, 5.1.14, 5.2.8
  • bitnami django 4.2.26, 5.1.14, 5.2.8
  • djangoproject Django 4.2.26, 5.1.14, 5.2.8
  • py3-django Alpine 3.24, Alpine 3.23, Alpine 3.22 4.2.26-r0

alpine advisories ALPINE-CVE-2025-64458

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-64458 updated cvss 7.5

Django: Denial-of-service vulnerability in Django on Windows

  • Red Hat OpenShift Service Mesh 2 openshift-service-mesh/pilot-rhel8, openshift-service-mesh/grafana-rhel8, openshift-service-mesh/proxyv2-rhel9, openshift-service-mesh/istio-cni-rhel8, openshift-service-mesh/ratelimit-rhel8, openshift-service-mesh/istio-rhel8-operator, +2 more Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-cni-rhel9, openshift-service-mesh/istio-pilot-rhel9, openshift-service-mesh/istio-proxyv2-rhel9, openshift-service-mesh/istio-rhel9-operator, openshift-service-mesh/istio-must-gather-rhel9, openshift-service-mesh/istio-sail-operator-bundle, +1 more Red Hat Ansible Automation Platform 2 automation-controller, ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform/ee-minimal-rhel8, ansible-automation-platform/ee-minimal-rhel9, ansible-automation-platform-26/mcp-tools-rhel9, +35 more Red Hat Discovery 1 discovery/discovery-server-rhel9 Red Hat Discovery 2 discovery/discovery-server-rhel9 Red Hat OpenStack Platform 13 (Queens) rhosp13/openstack-horizon, rhosp13/openstack-horizon-base
    +4 more products
    Red Hat OpenStack Platform 16.2 rhosp-rhel8/openstack-horizon Red Hat OpenStack Platform 17.1 rhosp-rhel9/openstack-horizon Red Hat OpenStack Platform 18.0 rhoso/openstack-horizon-rhel9 Red Hat Satellite 6 satellite/iop-advisor-backend-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi django
>=5.2a1, <5.2.8
>=5.0a1, <5.1.14
<4.2.26
>=4.2, <4.2.26
>=5.1, <5.1.14
>=5.2, <5.2.8
5.2.8
5.1.14
4.2.26
bitnami django
>=4.2.0, <4.2.26
>=5.1.0, <5.1.14
>=5.2.0, <5.2.8
4.2.26
5.1.14
5.2.8

Affected products

  • djangoproject Django

Classification

Weakness
  • CWE-407 Inefficient Algorithmic Complexity
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.