# CVE-2021-45115: python3-django: An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and4.0 before 4.0.1

CVE-2021-45115 is fixed in 4 products on 1 platform, first by python-django 1:1.11.11-1ubuntu1.15, released January 4, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-45115
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0260
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 4, 2022

## Description

An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significantoverhead in evaluating a submitted password that was artificially large inrelation to the comparison values. In a situation where access to userregistration was unrestricted, this provided a potential vector for adenial-of-service attack.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libdb rocky 8 | 0:5.3.28-42.el8_4 | [RLSA-2022:5498](https://patchblox.com/security/data/fix/linux/rlsa-2022-5498.md) | Jul 5, 2022 |
| Linux | python-django Debian 12.15 (bookworm) | 2:3.2.11-1 | [DEBIAN-CVE-2021-45115](https://patchblox.com/security/data/fix/linux/debian-cve-2021-45115.md) | Jan 5, 2022 |
| Linux | python-django Debian 13.5 (trixie) | 2:3.2.11-1 | [DEBIAN-CVE-2021-45115](https://patchblox.com/security/data/fix/linux/debian-cve-2021-45115.md) | Jan 5, 2022 |
| Linux | python-django Debian 14 | 2:3.2.11-1 | [DEBIAN-CVE-2021-45115](https://patchblox.com/security/data/fix/linux/debian-cve-2021-45115.md) | Jan 5, 2022 |
| Linux | python-django Ubuntu 18.04.6 LTS (bionic) | 1:1.11.11-1ubuntu1.15 | [python-django 1:1.11.11-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-django-1-1.11.11-1ubuntu1.15.md) | Jan 4, 2022 |
| Linux | python-django-common Ubuntu 18.04.6 LTS (bionic) | 1:1.11.11-1ubuntu1.15 | [python-django-common 1:1.11.11-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-django-common-1-1.11.11-1ubuntu1.15.md) | Jan 4, 2022 |
| Linux | python3-django Ubuntu 18.04.6 LTS (bionic) | 1:1.11.11-1ubuntu1.15 | [python3-django 1:1.11.11-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-django-1-1.11.11-1ubuntu1.15.md) | Jan 4, 2022 |
| Linux | python3-django Ubuntu 20.04 LTS (focal) | 2:2.2.12-1ubuntu0.9 | [python3-django 2:2.2.12-1ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-django-2-2.2.12-1ubuntu0.9.md) | Jan 4, 2022 |
| Linux | python3-django Ubuntu 24.10 (oracular) | 2:3.2.11-1 | [python3-django 2:3.2.11-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-django-2-3.2.11-1.md) | Jan 16, 2026 |
| Linux | python3-django Ubuntu 25.04 (plucky) | 2:3.2.11-1 | [python3-django 2:3.2.11-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-django-2-3.2.11-1.md) | Jan 16, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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