SFTPGo: Stored XSS via inline parameter on public shares and user file download

{
  "id": "8441fe343738cd77acc3ebef0c4cb1c2e60a504c67e6f44168a97f77df34f121",
  "url": "https://osv.dev/vulnerability/CVE-2026-49245",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SFTPGo: Stored XSS via inline parameter on public shares and user file download",
    "summary": "SFTPGo is an open source, event-driven file transfer solution. From 2.2.0 until 2.7.3, the inline query parameter on browsable-share file downloads and authenticated user-file downloads suppresses Content-Disposition: attachment, allowing an attacker-controlled HTML file stored in a share or home directory to be served as text/html in the SFTPGo web origin. An attacker who can place the file can send a crafted link to a victim, and opening that link executes the stored content in the victim's browser context. Exploitation requires social engineering and suitable share or shared-folder access, while HttpOnly session cookies limit direct cookie theft. This issue is fixed in version 2.7.3.",
    "evidence": "osv:CVE-2026-49245",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-49245",
      "aliases": [
        "CVE-2026-49245",
        "GHSA-3vcg-pv95-pq54",
        "GO-2026-5900"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/drakkan/sftpgo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a779e504484592d88f510ce7952f4fa18b671e21"
                },
                {
                  "fixed": "b5409a478138fca5f1d369ae5d47f753156cbd15"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.7.3"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b5409a478138fca5f1d369ae5d47f753156cbd15"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a779e504484592d88f510ce7952f4fa18b671e21"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.7.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.7.1",
            "v2.7.0",
            "v2.6.0",
            "v2.5.1",
            "v2.5.0",
            "v2.4.0",
            "v2.3.0",
            "v2.2.1",
            "v2.2.0",
            "v2.1.0",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "0.9.6",
            "0.9.5",
            "0.9.4",
            "0.9.3",
            "0.9.2",
            "0.9.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49245.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.607077984Z",
      "provider": "osv",
      "references": [
        "https://github.com/drakkan/sftpgo/releases/tag/v2.7.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49245.json",
        "https://github.com/drakkan/sftpgo/security/advisories/GHSA-3vcg-pv95-pq54",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-49245",
        "https://github.com/drakkan/sftpgo/commit/b5409a478138fca5f1d369ae5d47f753156cbd15"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": ">= 2.2.0 < 2.7.2"
                  },
                  {
                    "last_affected": ">= 2.2.0 < 2.7.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49245.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-49245",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 511566,
  "published_at": "2026-08-20T21:52:20.219+00:00"
}