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Fencer Vulns
high 7.5

CVE-2023-23969 in the critical feed json

Django contains Uncontrolled Resource Consumption via cached header

published 2023-02-01 3 y ago modified 2026-09-08 2 mo ago also BIT-django-2023-23969 , EUVD-2023-0066 , GHSA-q2jf-h9jm-m7p4 , PYSEC-2023-12

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
47.4%
EPSS 47.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

In Django 3.2 before 3.2.17, 4.0 before 4.0.9, and 4.1 before 4.1.6, the parsed values of Accept-Language headers are cached in order to avoid repetitive parsing. This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large.

Patch / fix

  • pypi django 3.2.17, 4.0.9, 4.1.6
  • bitnami django 3.2.17, 4.0.9, 4.1.6
  • djangoproject django 3.2.17, 4.0.9, 4.1.6
  • python-django Debian 14, Debian 13, Debian 12 3:3.2.17-1

debian advisories DEBIAN-CVE-2023-23969

  • python-django Ubuntu 18.04 LTS 1:1.11.11-1ubuntu1.19
  • python-django Ubuntu 20.04 LTS 2:2.2.12-1ubuntu0.15
  • python-django Ubuntu 22.04 LTS 2:3.2.12-2ubuntu1.4
  • python-django Ubuntu Pro 16.04 LTS 1.8.7-1ubuntu5.15+esm6

ubuntu advisories UBUNTU-CVE-2023-23969

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cjson satellite capsule 6.13, satellite 6.13 1.7.14-5.el8sat
  • foreman satellite utils 6.13, satellite capsule 6.13, satellite 6.13 3.5.1.14-1.el8sat
  • katello satellite capsule 6.13, satellite 6.13 4.7.0-1.el8sat
  • libsolv satellite capsule 6.13, satellite 6.13 0.7.22-4.el8pc
  • libcomps satellite capsule 6.13, satellite 6.13 0.1.18-4.el8pc
  • qpid-cpp satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • qpid-qmf satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • candlepin satellite 6.13 4.2.13-1.el8sat

red hat advisories RHSA-2023:2097RHSA-2023:2101

  • python-Django openSUSE Leap 15.5 2.0.7-150000.1.20.1

suse advisories SUSE-SU-2024:2545-1

  • python-Django5 openSUSE Tumbleweed 5.2.16-1.1
  • python-Django4 openSUSE Tumbleweed 4.2.30-4.1
  • python-Django6 openSUSE Tumbleweed 6.0-1.1
  • python-Django openSUSE Tumbleweed 5.1.5-1.1
  • python-Django Package Hub 15 SP5, openSUSE Leap 15.5 2.2.28-bp155.7.12.1
  • python-Django4 openSUSE Tumbleweed 4.2.14-1.1
  • python-Django openSUSE Tumbleweed 4.1.6-1.1
  • python-Django Package Hub 15 SP5, openSUSE Leap 15.5 2.2.28-bp155.7.3.1

opensuse advisories openSUSE-SU-2026:11270-1openSUSE-SU-2026:11235-1openSUSE-SU-2026:10005-1openSUSE-SU-2025:14662-1openSUSE-SU-2024:0251-1openSUSE-SU-2024:14208-1

  • py3-django Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 3.2.17-r0

alpine advisories ALPINE-CVE-2023-23969

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-2023-23969 updated cvss 7.5

python-django: Potential denial-of-service via Accept-Language headers

  • Red Hat Ansible Automation Platform 2 python-django
    affected: no fix available
  • Red Hat Ceph Storage 3 python-django, python-django-bash-completion Red Hat OpenStack Platform 13 (Queens) python-django, python2-django, python-django-bash-completion
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 16.1 python-django20, python3-django20, python-django20-bash-completion Red Hat OpenStack Platform 16.2 python-django20, python3-django20, python-django20-bash-completion Red Hat OpenStack Platform 17.0 python3-django
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6 python-django, python2-django, python-django-bash-completion
    affected: no fix available
  • Red Hat Storage 3 python-django, python2-django, python-django-bash-completion Red Hat Update Infrastructure 3 for Cloud Providers python-django
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6.13 for RHEL 8 python-django 3.2.18-1.el8pc, python39-django 3.2.18-1.el8pc
    fixed: vendor fix RHSA-2023:2097
  • Red Hat RHUI 4 for RHEL 8 python-django 3.2.18-1.0.1.el8ui, python39-django 3.2.18-1.0.1.el8ui
    fixed: vendor fix RHSA-2023:2101
  • Red Hat Satellite 6.13 for RHEL 8 cjson 1.7.14-5.el8sat, katello 4.7.0-1.el8sat, libsolv 0.7.22-4.el8pc, libcomps 0.1.18-4.el8pc, python-idna 3.3-2.el8pc, python-pbr 5.8.0-4.el8pc, +669 more Red Hat RHUI 4 for RHEL 8 rhui-tools 4.4.0.5-1.el8ui, rhui-installer 4.4.0.5-1.el8ui, rhui-tools-libs 4.4.0.5-1.el8ui, python-future 0.18.3-1.0.1.el8ui, python39-future 0.18.3-1.0.1.el8ui
    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
19 mo ago

Exploit prediction

47.38% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

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
NVD 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
>=3.2a1, <3.2.17
>=4.0a1, <4.0.9
>=4.1a1, <4.1.6
>=3.2, <3.2.17
>=4.0, <4.0.9
>=4.1, <4.1.6
3.2.17
4.0.9
4.1.6
bitnami django
>=3.2.0, <3.2.17
>=4.0.0, <4.0.9
>=4.1.0, <4.1.6
3.2.17
4.0.9
4.1.6

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

References

Sources

Fencer Vulns 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.