CVE-2026-3902

{
  "id": "CVE-2026-3902",
  "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
  "published": "2026-04-07T15:17:46.353",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.\n`ASGIRequest` allows a remote attacker to spoof headers by exploiting an ambiguous mapping of two header variants (with hyphens or with underscores) to a single version with underscores.\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 Tarek Nakkouch for reporting this issue."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en 6.0 anterior a 6.0.4, 5.2 anterior a 5.2.13 y 4.2 anterior a 4.2.30.\nASGIRequest permite a un atacante remoto suplantar encabezados al explotar un mapeo ambiguo de dos variantes de encabezado (con guiones o con guiones bajos) a una única versión con guiones bajos.\nSeries de Django anteriores y no compatibles (como 5.0.x, 4.1.x y 3.2.x) no fueron evaluadas y también pueden verse afectadas.\nDjango desea agradecer a Tarek Nakkouch por informar sobre este problema."
    }
  ],
  "affected": [
    {
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "affectedData": [
        {
          "vendor": "djangoproject",
          "product": "Django",
          "defaultStatus": "unaffected",
          "collectionURL": "https://pypi.org/project/Django/",
          "packageName": "django",
          "repo": "https://github.com/django/django/",
          "versions": [
            {
              "version": "6.0",
              "lessThan": "6.0.4",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.0.4",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.2",
              "lessThan": "5.2.13",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.2.13",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "4.2",
              "lessThan": "4.2.30",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "4.2.30",
              "versionType": "semver",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-07T16:14:03.870418Z",
          "id": "CVE-2026-3902",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "4.2",
              "versionEndExcluding": "4.2.30",
              "matchCriteriaId": "C78D8198-229F-45A2-B09D-C1D272878E3E"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "5.2",
              "versionEndExcluding": "5.2.13",
              "matchCriteriaId": "5ED295FD-7063-40A1-9A3E-C0CC4D6F7BD3"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "6.0",
              "versionEndExcluding": "6.0.4",
              "matchCriteriaId": "344A677E-BD67-42F0-9746-5B0D4C53815E"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://docs.djangoproject.com/en/dev/releases/security/",
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://groups.google.com/g/django-announce",
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://www.djangoproject.com/weblog/2026/apr/07/security-releases/",
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}