CVE-2026-15337 (GCVE-0-2026-15337)

Vulnerability from cvelistv5 – Published: 2026-08-04 15:48 – Updated: 2026-08-04 17:21
VLAI
Title
Potential denial-of-service vulnerability in check_for_language()
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.9 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
DSF
References
Impacted products
Vendor Product Version
djangoproject Django Affected: 6.0 , < 6.0.8 (python)
Unaffected: 6.0.8 (python)
Affected: 5.2 , < 5.2.17 (python)
Unaffected: 5.2.17 (python)
Create a notification for this product.
Date Public
2026-08-04 10:00
Credits
Jaeyoung Jang Natalia Bidart Natalia Bidart
Show details on NVD website
To clipboard 

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Such codes reach the function through the \u003ccode\u003edjango.views.i18n.set_language()\u003c/code\u003e view, which is not routed by default. The consumed memory is bounded, since request data is limited by the \u003ccode\u003eDATA_UPLOAD_MAX_MEMORY_SIZE\u003c/code\u003e setting (default 2.5 MB) and the cache holds a fixed maximum number of entries.\u003c/p\u003e\u003cp\u003eEarlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected.\u003c/p\u003e\u003cp\u003eDjango would like to thank Jaeyoung Jang for reporting this issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-789\", \"description\": \"CWE-789: Memory Allocation with Excessive Size Value\"}]}], \"providerMetadata\": {\"orgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"shortName\": \"DSF\", \"dateUpdated\": \"2026-08-04T15:48:25.817Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-15337\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-04T17:21:43.493Z\", \"dateReserved\": \"2026-07-09T19:29:06.768Z\", \"assignerOrgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"datePublished\": \"2026-08-04T15:48:25.817Z\", \"assignerShortName\": \"DSF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.