CVE-2021-45115

An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significant overhead in evaluating a submitted password that was artificially large in relation to the comparison values. In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack.

• https://docs.djangoproject.com/en/4.0/releases/security/Patch, Vendor Advisory
• https://groups.google.com/forum/#%21forum/django-announce
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
• https://security.netapp.com/advisory/ntap-20220121-0005/Third Party Advisory
• https://www.djangoproject.com/weblog/2022/jan/04/security-releases/Patch, Vendor Advisory
• https://docs.djangoproject.com/en/4.0/releases/security/Patch, Vendor Advisory
• https://groups.google.com/forum/#%21forum/django-announce
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
• https://security.netapp.com/advisory/ntap-20220121-0005/Third Party Advisory
• https://www.djangoproject.com/weblog/2022/jan/04/security-releases/Patch, Vendor Advisory

Published

Jan 5, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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