CVE-2023-36053

Name: CVE-2023-36053
Creator: NVD / NIST
Published: 2023-07-03T13:15:09.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.67%

Last modified Jun 17, 2026

CVE-2023-36053 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.67%

83.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Djangoproject	Django	>= 3.2, < 3.2.20
Djangoproject	Django	>= 4.0, < 4.1.10
Djangoproject	Django	>= 4.2, < 4.2.3
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0
Fedoraproject	Fedora	37
Fedoraproject	Fedora	38

References

https://docs.djangoproject.com/en/4.2/releases/security/Release Notes
https://groups.google.com/forum/#%21forum/django-announcePermissions Required
https://lists.debian.org/debian-lts-announce/2023/07/msg00022.htmlMailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NRDGTUN4LTI6HG4TWR3JYLSFVXPZT42A/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5DYKPNDCEHJQ3TKPJQO7QGSR4FAYMS/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/
https://www.debian.org/security/2023/dsa-5465Third Party Advisory
https://www.djangoproject.com/weblog/2023/jul/03/security-releases/Patch, Vendor Advisory
https://docs.djangoproject.com/en/4.2/releases/security/Release Notes
https://groups.google.com/forum/#%21forum/django-announcePermissions Required
https://lists.debian.org/debian-lts-announce/2023/07/msg00022.htmlMailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NRDGTUN4LTI6HG4TWR3JYLSFVXPZT42A/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5DYKPNDCEHJQ3TKPJQO7QGSR4FAYMS/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/
https://www.debian.org/security/2023/dsa-5465Third Party Advisory
https://www.djangoproject.com/weblog/2023/jul/03/security-releases/Patch, Vendor Advisory

Timeline

Published: Jul 3, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-36053?

How severe is CVE-2023-36053?

CVE-2023-36053 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.67% probability of exploitation in the next 30 days.

How do I fix CVE-2023-36053?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-36053?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST