django-s3file: Relative path traversal

{
  "id": "ca5746af74268d875fc4ec9733d8092bc70e00231061ced86d67d0f19ad33d5b",
  "url": "https://osv.dev/vulnerability/CVE-2026-42196",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "django-s3file: Relative path traversal",
    "summary": "django-s3file is a lightweight file upload input for Django and Amazon S3. Prior to 7.0.2, S3FileMiddleware is vulnerable to relative path traversal attacks, where an attacker can use a modified request to escape pre-signed upload locations and have the Django application load files from random locations into request.FILES. Depending on how files are handled, this may lead to confidentiality and integrity issues. This vulnerability is fixed in 7.0.2.",
    "evidence": "osv:CVE-2026-42196",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-42196",
      "aliases": [
        "CVE-2026-42196",
        "GHSA-67qg-7284-2277",
        "PYSEC-2026-328"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/codingjoe/django-s3file",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8fce36bddd0b622badff02c5da49fd705fb29852"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3"
                      },
                      {
                        "fixed": "7.0.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.0.1",
            "7.0.0",
            "6.0.1",
            "6.0.0",
            "5.5.7",
            "5.5.6",
            "5.5.5",
            "5.5.4",
            "5.5.3",
            "5.5.2",
            "5.5.1",
            "5.5.0",
            "5.4.0",
            "5.3.0",
            "5.2.0",
            "5.1.3",
            "5.1.2",
            "5.1.1",
            "5.1.0",
            "5.0.6",
            "5.0.5",
            "5.0.4",
            "5.0.3",
            "5.0.2",
            "5.0.1",
            "5.0.0",
            "4.2.0",
            "4.1.0",
            "4.0.2",
            "4.0.1",
            "4.0.0",
            "3.0.5",
            "3.0.4",
            "3.0.3",
            "3.0.2",
            "3.0.1",
            "3.0.0",
            "2.0.0",
            "1.2.1",
            "1.2.0",
            "1.1.0",
            "1.0.2",
            "1.0.1",
            "1.0.0",
            "0.6.0",
            "0.5.4",
            "0.5.3",
            "0.5.2",
            "0.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42196.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.476833543Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42196.json",
        "https://github.com/codingjoe/django-s3file/security/advisories/GHSA-67qg-7284-2277",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42196"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22",
          "CWE-26"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42196.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-42196",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488679,
  "published_at": "2026-05-12T20:58:02.872+00:00"
}