CVE-2023-36053
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
02 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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 2.97% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 87.0% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-07-03 00:00Z3 YR AGO
- Last updated
- 2025-11-04 17:12Z11 MO AGO
- Reserved
- 2023-06-20
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333Inefficient Regular Expression ComplexityBase
- Data version
- 5.2
- Document digest
- 743b0daede3e94097d7b05fc10ed556c971668ed54bfc5e4162e177949872e96
05 Affected products
06 References
- groups.google.comhttps://groups.google.com/forum/#%21forum/django-announce
- docs.djangoproject.comhttps://docs.djangoproject.com/en/4.2/releases/security/
- www.djangoproject.comhttps://www.djangoproject.com/weblog/2023/jul/03/security-releases/
- lists.debian.org[debian-lts-announce] 20230719 [SECURITY] [DLA 3500-1] python-django security updatehttps://lists.debian.org/debian-lts-announce/2023/07/msg00022.html
- www.debian.orgDSA-5465https://www.debian.org/security/2023/dsa-5465
- lists.fedoraproject.orgFEDORA-2023-cc023fabb7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5DYKPNDCEHJQ3TKPJQO7QGSR4FAYMS/
- lists.fedoraproject.orgFEDORA-2023-9d36d373f1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NRDGTUN4LTI6HG4TWR3JYLSFVXPZT42A/
- lists.fedoraproject.orgFEDORA-2024-84fbbbb914https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/
07 Fixed in
Debian 12
- python-django Fixed in 3:3.2.19-1+deb12u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- python-django Fixed in 3:3.2.20-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- python-django Fixed in 3:3.2.20-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- python-django Fixed in 2:2.2.12-1ubuntu0.18
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- python-django Fixed in 2:3.2.12-2ubuntu1.7
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- python-django No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- python-django No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- python-django Fixed in 1:1.11.11-1ubuntu1.21+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.