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.
{
    "nvd_published_at": "2022-01-05T00:15:00Z",
    "severity": "HIGH",
    "github_reviewed_at": "2022-01-12T19:18:33Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-400"
    ]
}