PYSEC-2026-54

Vulnerability from pysec - Published: 2026-05-05 16:16 - Updated: 2026-05-20 09:18
VLAI?
Details

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 ?
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
Impacted products
Name purl
django pkg:pypi/django
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "django",
        "purl": "pkg:pypi/django"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.2"
            },
            {
              "fixed": "5.2.14"
            },
            {
              "introduced": "6.0"
            },
            {
              "fixed": "6.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.2",
        "5.2.1",
        "5.2.10",
        "5.2.11",
        "5.2.12",
        "5.2.13",
        "5.2.2",
        "5.2.3",
        "5.2.4",
        "5.2.5",
        "5.2.6",
        "5.2.7",
        "5.2.8",
        "5.2.9",
        "6.0",
        "6.0.1",
        "6.0.2",
        "6.0.3",
        "6.0.4"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-5766"
  ],
  "details": "An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\nASGI 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.\n \nAs a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Kyle Agronick for reporting this issue.",
  "id": "PYSEC-2026-54",
  "modified": "2026-05-20T09:18:59.272788Z",
  "published": "2026-05-05T16:16:17.740Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://docs.djangoproject.com/en/dev/releases/security/"
    },
    {
      "type": "ADVISORY",
      "url": "https://groups.google.com/g/django-announce"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/"
    }
  ],
  "severity": [
    {
      "score": "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/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",
      "type": "CVSS_V4"
    }
  ]
}


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