CVE-2026-15337
Potential denial-of-service vulnerability in check_for_language()
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.
INFO
Published Date :
Aug. 4, 2026, 5:16 p.m.
Last Modified :
Aug. 4, 2026, 6:16 p.m.
Remotely Exploit :
Yes !
Source :
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 |
Solution
- Update Django to version 5.2.17 or later.
- Update Django to version 6.0.8 or later.
- Consider upgrading unsupported Django versions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15337.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15337 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15337
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15337 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-15337 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 04, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-15337', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-04T17:15:59.533868Z'} -
New CVE Received by 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/django/django/', 'vendor': 'djangoproject', 'product': 'Django', 'versions': [{'status': 'affected', 'version': '6.0', 'lessThan': '6.0.8', 'versionType': 'python'}, {'status': 'unaffected', 'version': '6.0.8', 'versionType': 'python'}, {'status': 'affected', 'version': '5.2', 'lessThan': '5.2.17', 'versionType': 'python'}, {'status': 'unaffected', 'version': '5.2.17', 'versionType': 'python'}], 'packageName': 'django', 'collectionURL': 'https://pypi.org/project/Django/', 'defaultStatus': 'unaffected'}] 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-789 Added Reference https://docs.djangoproject.com/en/dev/releases/security/ Added Reference https://github.com/django/django/commit/224dbc832586ad5cfb0237c2ff30d14baeaddc6f Added Reference https://github.com/django/django/commit/27137e655e442e81095f1f8f77ff3870d9fdf169 Added Reference https://github.com/django/django/commit/5b3523d29be25948e1dd90b3863a002f00fc865f Added Reference https://github.com/django/django/commit/c72a5dbb64d0777f3f471f1be94e8b2ca91e0959 Added Reference https://groups.google.com/g/django-announce Added Reference https://www.djangoproject.com/weblog/2026/aug/04/security-releases/