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CVE-2023-36053 — Vulnerability in django — CVE Details

HIGH

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

Published July 3, 2023Updated November 4, 2025Source: osv

What Should I Do?

Address in Next Maintenance Window

Low exploitation probability (8.92%). Schedule for your next planned update.

Summary

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.

Advisory Timeline

  • First published July 3, 2023 (1197 days ago).
  • Last revised November 4, 2025 — 855 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update django to 3.2.20 or later
pip install "django>=3.2.20"
pip
Update django to 4.1.10 or later
pip install "django>=4.1.10"
pip
Update django to 4.2.3 or later
pip install "django>=4.2.3"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
django
pypi
3.2, 3.2.1, 3.2.10, 3.2.11 (+19 more)3.2.20
django
pypi
4.0, 4.0.1, 4.0.10, 4.0.2 (+23 more)4.1.10
django
pypi
4.2, 4.2.1, 4.2.2, 4.2a1 (+2 more)4.2.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

References

Frequently Asked Questions

What is CVE-2023-36053?
Django has regular expression denial of service vulnerability in EmailValidator/URLValidator This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2023-36053?
CVE-2023-36053 affects django. It has a 8.9% probability of exploitation within 30 days (EPSS score). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-36053 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

EPSS Score (30-day exploit probability)
8.92%
Higher than 92% of vulnerabilities

This places it in the top 10% of EPSS-scored vulnerabilities — 92.4% of tracked vulnerabilities score at or below it, so it is substantially more likely to be exploited than most tracked vulnerabilities.

Also Known As

GHSA-jh3w-4vvf-mjgr
BIT-django-2023-36053
PYSEC-2023-100

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