Description
An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8.
`django.utils.translation.check_for_language()` is subject to a potential denial-of-service attack when given many distinct, very long language codes, which are retained as keys in an in-memory cache and consume process memory. Such codes reach the function through the `django.views.i18n.set_language()` view, which is not routed by default. The consumed memory is bounded, since request data is limited by the `DATA_UPLOAD_MAX_MEMORY_SIZE` setting (default 2.5 MB) and the cache holds a fixed maximum number of entries.
Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected.
Django would like to thank Jaeyoung Jang for reporting this issue.
Published: 2026-08-04
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4736-1 python-django security update
History

Wed, 05 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1050
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 04 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Djangoproject
Djangoproject django
Vendors & Products Djangoproject
Djangoproject django

Tue, 04 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 04 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Description An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. `django.utils.translation.check_for_language()` is subject to a potential denial-of-service attack when given many distinct, very long language codes, which are retained as keys in an in-memory cache and consume process memory. Such codes reach the function through the `django.views.i18n.set_language()` view, which is not routed by default. The consumed memory is bounded, since request data is limited by the `DATA_UPLOAD_MAX_MEMORY_SIZE` setting (default 2.5 MB) and the cache holds a fixed maximum number of entries. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Jaeyoung Jang for reporting this issue.
Title Potential denial-of-service vulnerability in check_for_language()
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Subscriptions

Djangoproject Django
cve-icon MITRE

Status: PUBLISHED

Assigner: DSF

Published:

Updated: 2026-08-04T17:21:43.493Z

Reserved: 2026-07-09T19:29:06.768Z

Link: CVE-2026-15337

cve-icon Vulnrichment

Updated: 2026-08-04T17:21:37.463Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-04T17:16:46.453

Modified: 2026-08-12T20:52:23.120

Link: CVE-2026-15337

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-04T15:48:25Z

Links: CVE-2026-15337 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-05T13:30:05Z

Weaknesses
  • CWE-1050

    Excessive Platform Resource Consumption within a Loop

  • CWE-789

    Memory Allocation with Excessive Size Value