CVE-2022-41323: Django denial-of-service vulnerability in internationalized URLs

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-16 · updated 2026-06-17
Weakness: CWE-1333

Description

In Django 3.2 before 3.2.16, 4.0 before 4.0.8, and 4.1 before 4.1.2, internationalized URLs were subject to a potential denial of service attack via the locale parameter, which is treated as a regular expression.

Affected products

Django: from 3.2 before 3.2.16; from 4.0 before 4.0.8; from 4.1 before 4.1.2 — fixed in 3.2.16, 4.0.8, 4.1.2
Pypi Django: from 3.2 before 3.2.16; from 4.0 before 4.0.8; from 4.1 before 4.1.2; 3.2, 3.2.1, 3.2.10, 3.2.11, 3.2.12, 3.2.13 (+30) — fixed in 3.2.16, 4.0.8, 4.1.2

How to fix

Upgrade to a fixed version: Django 3.2.16, 4.0.8, 4.1.2; Pypi Django 3.2.16, 4.0.8, 4.1.2. Check the vendor advisory for mitigations.

References

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