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Fencer Vulns
high 7.3

CVE-2021-44420 json

Potential bypass of an upstream access control based on URL paths in Django

published 2021-12-07 4 y ago modified 2026-09-08 2 mo ago also BIT-django-2021-44420 , EUVD-2021-0062 , GHSA-v6rh-hp5x-86rv , PYSEC-2021-439

cvss
7.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

In Django 2.2 before 2.2.25, 3.1 before 3.1.14, and 3.2 before 3.2.10, HTTP requests for URLs with trailing newlines could bypass upstream access control based on URL paths.

Patch / fix

  • pypi django 2.2.25, 3.1.14, 3.2.10
  • bitnami django 2.2.25, 3.1.14, 3.2.10
  • djangoproject django 2.2.25, 3.1.14, 3.2.10
  • python-django Debian 14, Debian 13, Debian 12 2:3.2.10-1

debian advisories DEBIAN-CVE-2021-44420

  • python-django Ubuntu 20.04 LTS 2:2.2.12-1ubuntu0.8

ubuntu advisories UBUNTU-CVE-2021-44420

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

  • foreman satellite utils 6.11, satellite capsule 6.11, satellite 6.11 3.1.1.21-2.el7sat
  • foreman satellite utils 6.11, satellite capsule 6.11, satellite 6.11 3.1.1.21-2.el8sat
  • libsolv satellite capsule 6.11, satellite 6.11 0.7.22-1.el7pc
  • libsolv satellite capsule 6.11, satellite 6.11 0.7.22-1.el8pc
  • candlepin satellite 6.11 4.1.13-1.el7sat
  • candlepin satellite 6.11 4.1.13-1.el8sat
  • satellite satellite utils 6.11, satellite capsule 6.11, satellite 6.11 6.11.0-2.el7sat
  • satellite satellite utils 6.11, satellite capsule 6.11, satellite 6.11 6.11.0-2.el8sat

red hat advisories RHSA-2022:5498RHSA-2023:0742

  • python-sentry-sdk openSUSE Tumbleweed 2.20.0-1.1
  • python-sentry-sdk openSUSE Tumbleweed 1.5.4-1.1
  • python-Django Package Hub 15 SP3, openSUSE Leap 15.3 2.2.28-bp153.2.3.1

opensuse advisories openSUSE-SU-2025:14702-1openSUSE-SU-2024:11791-1openSUSE-SU-2023:0005-1

  • libdb Rocky Linux 8 5.3.28-42.el8_4

rocky linux advisories RLSA-2022:5498

  • py3-django Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 3.2.12-r0

alpine advisories ALPINE-CVE-2021-44420

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

  • python-django Arch Linux 3.2.10-1

arch linux advisories AVG-2605

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-2021-44420 updated cvss 5.3

django: potential bypass of an upstream access control based on URL paths

  • Red Hat Ansible Automation Platform 1.2 python-django Red Hat Ansible Automation Platform 2 python-django Red Hat Ansible Tower 3 django
    affected: no fix available
  • Red Hat Ceph Storage 2 python-django, calamari-server, python-django-bash-completion Red Hat Ceph Storage 3 python-django, python-django-bash-completion Red Hat OpenStack Platform 10 (Newton) 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 Satellite 6 python3-django
    affected: no fix available
  • Red Hat Storage 3 python-django, python2-django, python-django-bash-completion
    affected: no fix available “Fix deferred”
  • Red Hat Satellite 6.11 for RHEL 8 python-django 3.2.13-1.el8pc
    fixed: vendor fix RHSA-2022:5498
  • Red Hat RHUI 4 for RHEL 8 python-django 3.2.16-1.0.1.el8ui, python39-django 3.2.16-1.0.1.el8ui
    fixed: vendor fix RHSA-2023:0742
  • 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 Satellite 6.11 for RHEL 7 tfm 7.0-1.el7sat, gofer 2.12.5-7.el7sat, katello 4.3.0-3.el7sat, libsolv 0.7.22-1.el7pc, libcomps 0.1.18-1.el7pc, libsolv0 0.6.34-4.el7sat, +638 more Red Hat Satellite 6.11 for RHEL 8 libdb 5.3.28-42.el8_4, katello 4.3.0-3.el8sat, libsolv 0.7.22-1.el8pc, libcomps 0.1.18-1.el8pc, python-idna 3.3-1.el8pc, python-pbr 5.6.0-1.el8pc, +628 more Red Hat RHUI 4 for RHEL 8 libsolv 0.7.22-4.0.1.el8ui, rhui-tools 4.3.0.8-1.el8ui, libcomps 0.1.18-4.0.1.el8ui, python-naya 1.1.1-3.0.1.el8ui, python-xlrd 2.0.1-5.0.1.el8ui, python-xlwt 1.3.0-3.0.1.el8ui, +167 more
    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

Exploit prediction

2.42% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
OSV 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
pypi django
>=2.2a1, <2.2.25
>=3.0a1, <3.1.14
>=3.2a1, <3.2.10
>=2.2, <2.2.25
>=3.1, <3.1.14
>=3.2, <3.2.10
2.2.25
3.1.14
3.2.10
bitnami django
>=2.2.0, <2.2.25
>=3.1.0, <3.1.14
>=3.2.0, <3.2.10
2.2.25
3.1.14
3.2.10

Classification

Weakness
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.