CVE-2026-53878 (GCVE-0-2026-53878)

Vulnerability from cvelistv5 – Published: 2026-07-07 14:10 – Updated: 2026-07-07 14:58
VLAI
Title
Header injection possibility since DomainNameValidator accepted newlines in input
Summary
An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `DomainNameValidator` does not prohibit newlines in domain names (unless used via a form field, since `CharField` strips newlines). If an application uses values with newlines in an HTTP response, header injection can occur. Django itself is unaffected because `HttpResponse` prohibits newlines in HTTP headers. 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 Bence Nagy for reporting this issue.
Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-07 14:58 UTC
CWE
  • CWE-144 - Improper Neutralization of Line Delimiters
Assigner
DSF CNA under the mitre root
CNA scorecard B 86/100 over 18 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
djangoproject Django Affected: 6.0 , < 6.0.7 (python)
Unaffected: 6.0.7 (python)
Affected: 5.2 , < 5.2.16 (python)
Unaffected: 5.2.16 (python)
guessed Create a notification for this product.
Date Public
2026-07-07 09:00
Credits
Bence Nagy Natalia Bidart Jacob Walls
Show details on NVD website
To clipboard 

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          },
          "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: 6.0.7 and 5.2.16",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.djangoproject.com/weblog/2026/jul/07/security-releases/"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-06-02T12:00:00.000Z",
              "value": "Initial report received."
            },
            {
              "lang": "en",
              "time": "2026-06-11T12:00:00.000Z",
              "value": "Vulnerability confirmed."
            },
            {
              "lang": "en",
              "time": "2026-07-07T09:00:00.000Z",
              "value": "Security release issued."
            }
          ],
          "title": "Header injection possibility since DomainNameValidator accepted newlines in input",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
        "assignerShortName": "DSF",
        "cveId": "CVE-2026-53878",
        "datePublished": "2026-07-07T14:10:29.935Z",
        "dateReserved": "2026-06-11T01:11:27.546Z",
        "dateUpdated": "2026-07-07T14:58:18.415Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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