No exploitation reportedFix available

CVE-2023-41164

Q: Is CVE-2023-41164 actively exploited?

Active exploitation of CVE-2023-41164 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-41164?

CVE-2023-41164 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2023-11-03
Fixed in4.2.5 · 4.1.11 · 3.2.21
WeaknessCWE-1284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Django 3.2 before 3.2.21, 4.1 before 4.1.11, and 4.2 before 4.2.5, django.utils.encoding.uri_to_iri() is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters.

Timeline

dates in UTC

2023-11-0305:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-41164?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-41164?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Django

Branch	Affected	Fixed in	Source
4.2	≥ 4.2, < 4.2.5	4.2.5	NVD · OSV
4.2	≥ 4.2.0, < 4.2.5	4.2.5	OSV
4.1	≥ 4.1, < 4.1.11	4.1.11	NVD · OSV
4.1	≥ 4.1.0, < 4.1.11	4.1.11	OSV
3.2	≥ 3.2, < 3.2.21	3.2.21	NVD · OSV
3.2	≥ 3.2.0, < 3.2.21	3.2.21	OSV

Fedoraproject fedora

Branch	Affected	Fixed in	Source
39.x	= 39	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Django to 4.2.5 · 4.1.11 · 3.2.21

Advisories and patches

docs.djangoproject.comVendor Advisory
www.djangoproject.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDweakness (CWE)CWE-1284read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2023-11-03
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-41164?

Is CVE-2023-41164 actively exploited?

Active exploitation of CVE-2023-41164 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-41164?

CVE-2023-41164 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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