In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator…
Priority MEDIUM 41CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 4 fixed, 9 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_ipv46_address do not prohibit leading zero characters in octal literals. This may allow a bypass of access control that is based on IP addresses. (validate_ipv4_address and validate_ipv46_address are unaffected with Python 3.9.5+..) .
Why it matters now
EPSS 0.0526 92nd percentileScored 2026-11-07
Fix Partial Django (PyPI): 2.2.24, 3.1.12, 3.2.4Red Hat: 3 advisoriesRed Hat: 4 fixed, 9 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | Django (PyPI) | 2.2a1 to before 2.2.24 | 2.2.24 | Patch available | GHSA-p99v-5w3c-jqq9 |
| — | Django (PyPI) | 3.0a1 to before 3.1.12 | 3.1.12 | Patch available | GHSA-p99v-5w3c-jqq9 |
| — | Django (PyPI) | 3.2a1 to before 3.2.4 | 3.2.4 | Patch available | GHSA-p99v-5w3c-jqq9 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- Django (PyPI) Vendor— Affected 2.2a1 to before 2.2.24 Fixed in 2.2.24 Patch available GHSA-p99v-5w3c-jqq9
- Django (PyPI) Vendor— Affected 3.0a1 to before 3.1.12 Fixed in 3.1.12 Patch available GHSA-p99v-5w3c-jqq9
- Django (PyPI) Vendor— Affected 3.2a1 to before 3.2.4 Fixed in 3.2.4 Patch available GHSA-p99v-5w3c-jqq9
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:* | 2.2 to before 2.2.24; 3.0 to before 3.1.12; 3.2 to before 3.2.4 | Vulnerable | djangoproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
- cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:* Versions 2.2 to before 2.2.24; 3.0 to before 3.1.12; 3.2 to before 3.2.4 Vulnerable ·djangoproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-p99v-5w3c-jqq9 Django (PyPI) Fixed in 2.2.24 Advisory →
- Fix · GHSA-p99v-5w3c-jqq9 Django (PyPI) Fixed in 3.1.12 Advisory →
- Fix · GHSA-p99v-5w3c-jqq9 Django (PyPI) Fixed in 3.2.4 Advisory →
Red Hat 3 advisories
- RHSA-2021:5070 Released 2021-12-09 · Red Hat rating ModerateRed Hat OpenStack Platform 16.1 (python-django20) security update
- Red Hat OpenStack Platform 16.1 python-django20-2.0.13-16.el8ost.1, python-django20-bash-completion-2.0.13-16.el8ost.1, python3-django20-2.0.13-16.el8ost.1
- RHSA-2021:4702 Released 2021-11-16 · Red Hat rating ModerateSatellite 6.10 Release
- Red Hat Satellite 6.10 candlepin-4.0.9-1.el7sat, foreman-2.5.2.17-2.el7sat, python-aiohttp-3.7.4-1.el7pc +14
- Red Hat Satellite Capsule 6.10 foreman-2.5.2.17-2.el7sat, python-aiohttp-3.7.4-1.el7pc, python-ecdsa-0.13.3-2.el7pc +9
- RHSA-2021:3490 Released 2021-09-15 · Red Hat rating ModerateRed Hat OpenStack Platform 16.2 (python-django20) security update
- Red Hat OpenStack Platform 16.2 python-django20-2.0.13-16.el8ost.1, python3-django20-2.0.13-16.el8ost.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ansible Automation Platform 1.2 | Affected | No fix yet |
| Red Hat Ansible Tower 3 | Affected | No fix planned: Out of support scope |
| Red Hat Ceph Storage 2 | Affected | No fix planned: Out of support scope |
| Red Hat Ceph Storage 3 | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Will not fix |
| Red Hat Satellite 6 | Affected | No fix planned: Will not fix |
| Red Hat Storage 3 | Affected | No fix planned: Will not fix |
| Red Hat Update Infrastructure 3 for Cloud Providers | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 16.1 | Fixed | RHSA-2021:5070 |
| Red Hat OpenStack Platform 16.2 | Fixed | RHSA-2021:3490 |
| Red Hat Satellite 6.10 | Fixed | RHSA-2021:4702 |
| Red Hat Satellite Capsule 6.10 | Fixed | RHSA-2021:4702 |
Not affected: 2 products
- Red Hat Satellite 6.10
- Red Hat Satellite Capsule 6.10
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33571
- 2026-10-03 Alias added: GHSA-p99v-5w3c-jqq9
References
Patch 2
Advisory 5
Other 10
- https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
- https://docs.djangoproject.com/en/3.2/releases/security
- https://github.com/django/django
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2021-99.yaml
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV
- https://lists.fedoraproject.org/archives/list/[email protected]/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV
- https://security.netapp.com/advisory/ntap-20210727-0004
- https://www.djangoproject.com/weblog/2021/jun/02/security-releases
Sources
- CVE-2021-33571 · CVE Program
- CVE-2021-33571 · NVD
- FIRST EPSS
- GHSA-p99v-5w3c-jqq9 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-33571 · Red Hat security data · CC BY 4.0
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