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CVE-2026-5766 (GCVE-0-2026-5766)

Vulnerability from cvelistv5 – Published: 2026-05-05 14:49 – Updated: 2026-05-06 15:25
VLAI
Title
Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass
Summary
An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causing service degradation. As a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Kyle Agronick 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
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 17:03 UTC
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
Impacted products
Vendor Product Version CPE status
djangoproject Django Affected: 6.0 , < 6.0.5 (python)
Unaffected: 6.0.5 (python)
Affected: 5.2 , < 5.2.14 (python)
Unaffected: 5.2.14 (python)
guessed Create a notification for this product.
Date Public
2026-05-05 09:00
Credits
Kyle Agronick Jacob Walls Sarah Boyce
Show details on NVD website
To clipboard 

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            "shortName": "DSF"
          },
          "references": [
            {
              "name": "Django security archive",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://docs.djangoproject.com/en/dev/releases/security/"
            },
            {
              "name": "Django releases announcements",
              "tags": [
                "mailing-list"
              ],
              "url": "https://groups.google.com/g/django-announce"
            },
            {
              "name": "Django security releases issued: 6.0.5 and 5.2.14",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2024-05-12T10:32:17.000Z",
              "value": "Initial report received."
            },
            {
              "lang": "en",
              "time": "2026-04-07T10:32:20.000Z",
              "value": "Vulnerability confirmed."
            },
            {
              "lang": "en",
              "time": "2026-05-05T09:00:00.000Z",
              "value": "Security release issued."
            }
          ],
          "title": "Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
        "assignerShortName": "DSF",
        "cveId": "CVE-2026-5766",
        "datePublished": "2026-05-05T14:49:19.715Z",
        "dateReserved": "2026-04-07T19:29:07.042Z",
        "dateUpdated": "2026-05-05T14:49:19.715Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.