GHSA-jh3w-4vvf-mjgr
HIGH
Django has regular expression denial of service vulnerability in EmailValidator/URLValidator
Published July 3, 2023Updated November 4, 2025Source: osv
Details
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.
Remediation
Upgrade to the fixed version using your package manager.
pip
Update django to 3.2.20 or laterpip install "django>=3.2.20"
pip
Update django to 4.1.10 or laterpip install "django>=4.1.10"
pip
Update django to 4.2.3 or laterpip install "django>=4.2.3"
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (3)
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-1333
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 3.1 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
- https://nvd.nist.gov/vuln/detail/CVE-2023-36053ADVISORY
- https://github.com/django/django/commit/454f2fb93437f98917283336201b4048293f7582WEB
- https://github.com/django/django/commit/ad0410ec4f458aa39803e5f6b9a3736527062dcdWEB
- https://github.com/django/django/commit/b7c5feb35a31799de6e582ad6a5a91a9de74e0f9WEB
- https://github.com/django/django/commit/beb3f3d55940d9aa7198bf9d424ab74e873aec3dWEB
- https://www.djangoproject.com/weblog/2023/jul/03/security-releasesWEB
- https://www.debian.org/security/2023/dsa-5465WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4DWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XG5DYKPNDCEHJQ3TKPJQO7QGSR4FAYMSWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRDGTUN4LTI6HG4TWR3JYLSFVXPZT42AWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4DWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5DYKPNDCEHJQ3TKPJQO7QGSR4FAYMSWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NRDGTUN4LTI6HG4TWR3JYLSFVXPZT42AWEB
- https://lists.debian.org/debian-lts-announce/2023/07/msg00022.htmlWEB
- https://groups.google.com/forum/#%21forum/django-announceWEB
- https://groups.google.com/forum/#!forum/django-announceWEB
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2023-100.yamlWEB
- https://github.com/django/djangoPACKAGE
- https://docs.djangoproject.com/en/4.2/releases/securityWEB
Risk Assessment
CVSS Score
3.1
Exploitation is difficult or impact is minor. Address in your next planned update.
EPSS Score (30-day exploit probability)
8.92%
Higher than 92% of vulnerabilities
Also Known As
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