Vulnerability advisory

GHSA-jh3w-4vvf-mjgr

Django has regular expression denial of service vulnerability in EmailValidator/URLValidator

Published Jul 3, 2023Updated Nov 4, 2025OSV record ↗

Also known as BIT-django-2023-36053CVE-2023-36053PYSEC-2023-100

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected versions

django PyPI

All django advisories →

Affected	Fixed in
`3.2a1` to before 3.2.20	`3.2.20`Advisories →
Also listed as affected (23) `3.2` `3.2.1` `3.2.10` `3.2.11` `3.2.12` `3.2.13` `3.2.14` `3.2.15` `3.2.16` `3.2.17` `3.2.18` `3.2.19` `3.2.2` `3.2.3` `3.2.4` `3.2.5` `3.2.6` `3.2.7` `3.2.8` `3.2.9` `3.2a1` `3.2b1` `3.2rc1`
`4.0a1` to before 4.1.10	`4.1.10`Advisories →
Also listed as affected (27) `4.0` `4.0.1` `4.0.10` `4.0.2` `4.0.3` `4.0.4` `4.0.5` `4.0.6` `4.0.7` `4.0.8` `4.0.9` `4.0a1` `4.0b1` `4.0rc1` `4.1` `4.1.1` `4.1.2` `4.1.3` `4.1.4` `4.1.5` `4.1.6` `4.1.7` `4.1.8` `4.1.9` `4.1a1` `4.1b1` `4.1rc1`
`4.2a1` to before 4.2.3	`4.2.3`Advisories →
Also listed as affected (6) `4.2` `4.2.1` `4.2.2` `4.2a1` `4.2b1` `4.2rc1`

Description

In Django 3.2 before 3.2.20, 4 before 4.1.10, and 4.2 before 4.2.3, EmailValidator and URLValidator are subject to a potential ReDoS (regular expression denial of service) attack via a very large number of domain name labels of emails and URLs.

GHSA-jh3w-4vvf-mjgr

Affected versions

django PyPI

Description

References