CVE-2023-36053

Aliases:GHSA-jh3w-4vvf-mjgrBIT-django-2023-36053PYSEC-2023-100
Advisory lineage Upstream: 0 Downstream: 23
Modified
Published: 03 Jul 2023, 00:00
Last modified:04 Nov 2025, 17:12

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
8.92% LOW
9% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Jul 2023, 00:00
Published
Vulnerability first disclosed
04 Nov 2025, 17:12
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v4.0•HIGH•Score: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 8.92%• Percentile: 93%

Techniques & Countermeasures

  • CWE-1333•Inefficient Regular Expression Complexity

    The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

Affected Systems

  • debian•debian_linux

    10.0 | 11.0 | 12.0

  • djangoproject•django

    ≥ 3.2, < 3.2.20 | ≥ 4.0, < 4.1.10 | ≥ 4.2, < 4.2.3

  • fedoraproject•fedora

    37 | 38

  • PyPI•django

    ≥ 3.2a1, < 3.2.20 | ≥ 4.0a1, < 4.1.10 | ≥ 4.2a1, < 4.2.3 | ≥ 3.2, < 3.2.20

References (25)